diff --git a/API/Controllers/ReaderController.cs b/API/Controllers/ReaderController.cs
index a18851f34..5a39f354a 100644
--- a/API/Controllers/ReaderController.cs
+++ b/API/Controllers/ReaderController.cs
@@ -61,13 +61,27 @@ namespace API.Controllers
         }
 
         [HttpGet("get-bookmark")]
-        public async Task<ActionResult<int>> GetBookmark(int chapterId)
+        public async Task<ActionResult<BookmarkDto>> GetBookmark(int chapterId)
         {
             var user = await _unitOfWork.UserRepository.GetUserByUsernameAsync(User.GetUsername());
-            if (user.Progresses == null) return Ok(0);
+            var bookmark = new BookmarkDto()
+            {
+                PageNum = 0,
+                ChapterId = chapterId,
+                VolumeId = 0,
+                SeriesId = 0
+            };
+            if (user.Progresses == null) return Ok(bookmark);
             var progress = user.Progresses.SingleOrDefault(x => x.AppUserId == user.Id && x.ChapterId == chapterId);
 
-            return Ok(progress?.PagesRead ?? 0);
+            if (progress != null)
+            {
+                bookmark.SeriesId = progress.SeriesId;
+                bookmark.VolumeId = progress.VolumeId;
+                bookmark.PageNum = progress.PagesRead;
+                bookmark.BookScrollId = progress.BookScrollId;
+            }
+            return Ok(bookmark);
         }
 
         [HttpPost("mark-read")]
@@ -222,6 +236,7 @@ namespace API.Controllers
                     VolumeId = bookmarkDto.VolumeId,
                     SeriesId = bookmarkDto.SeriesId,
                     ChapterId = bookmarkDto.ChapterId,
+                    BookScrollId = bookmarkDto.BookScrollId,
                     LastModified = DateTime.Now
                 });
             }
@@ -230,6 +245,7 @@ namespace API.Controllers
                 userProgress.PagesRead = bookmarkDto.PageNum;
                 userProgress.SeriesId = bookmarkDto.SeriesId;
                 userProgress.VolumeId = bookmarkDto.VolumeId;
+                userProgress.BookScrollId = bookmarkDto.BookScrollId;
                 userProgress.LastModified = DateTime.Now;
             }
             
diff --git a/API/DTOs/BookmarkDto.cs b/API/DTOs/BookmarkDto.cs
index e2a1c6c2d..c06f6d30a 100644
--- a/API/DTOs/BookmarkDto.cs
+++ b/API/DTOs/BookmarkDto.cs
@@ -2,9 +2,14 @@
 {
     public class BookmarkDto
     {
-        public int VolumeId { get; init; }
-        public int ChapterId { get; init; }
-        public int PageNum { get; init; }
-        public int SeriesId { get; init; }
+        public int VolumeId { get; set; }
+        public int ChapterId { get; set; }
+        public int PageNum { get; set; }
+        public int SeriesId { get; set; }
+        /// <summary>
+        /// For Book reader, this can be an optional string of the id of a part marker, to help resume reading position
+        /// on pages that combine multiple "chapters".
+        /// </summary>
+        public string BookScrollId { get; set; }
     }
 }
\ No newline at end of file
diff --git a/API/Data/Migrations/20210603212429_BookScrollIdProgress.Designer.cs b/API/Data/Migrations/20210603212429_BookScrollIdProgress.Designer.cs
new file mode 100644
index 000000000..01a7c07a1
--- /dev/null
+++ b/API/Data/Migrations/20210603212429_BookScrollIdProgress.Designer.cs
@@ -0,0 +1,863 @@
+// <auto-generated />
+using System;
+using API.Data;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+namespace API.Data.Migrations
+{
+    [DbContext(typeof(DataContext))]
+    [Migration("20210603212429_BookScrollIdProgress")]
+    partial class BookScrollIdProgress
+    {
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "5.0.4");
+
+            modelBuilder.Entity("API.Entities.AppRole", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("ConcurrencyStamp")
+                        .IsConcurrencyToken()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("NormalizedName")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("NormalizedName")
+                        .IsUnique()
+                        .HasDatabaseName("RoleNameIndex");
+
+                    b.ToTable("AspNetRoles");
+                });
+
+            modelBuilder.Entity("API.Entities.AppUser", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("AccessFailedCount")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("ConcurrencyStamp")
+                        .IsConcurrencyToken()
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTime>("Created")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Email")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("EmailConfirmed")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateTime>("LastActive")
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("LockoutEnabled")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateTimeOffset?>("LockoutEnd")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("NormalizedEmail")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("NormalizedUserName")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("PasswordHash")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("PhoneNumber")
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("PhoneNumberConfirmed")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<uint>("RowVersion")
+                        .IsConcurrencyToken()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("SecurityStamp")
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("TwoFactorEnabled")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("UserName")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("NormalizedEmail")
+                        .HasDatabaseName("EmailIndex");
+
+                    b.HasIndex("NormalizedUserName")
+                        .IsUnique()
+                        .HasDatabaseName("UserNameIndex");
+
+                    b.ToTable("AspNetUsers");
+                });
+
+            modelBuilder.Entity("API.Entities.AppUserPreferences", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("AppUserId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<bool>("BookReaderDarkMode")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("BookReaderFontFamily")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("BookReaderFontSize")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("BookReaderLineSpacing")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("BookReaderMargin")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("BookReaderReadingDirection")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<bool>("BookReaderTapToPaginate")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("PageSplitOption")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("ReadingDirection")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("ScalingOption")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<bool>("SiteDarkMode")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("AppUserId")
+                        .IsUnique();
+
+                    b.ToTable("AppUserPreferences");
+                });
+
+            modelBuilder.Entity("API.Entities.AppUserProgress", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("AppUserId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("BookScrollId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("ChapterId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateTime>("Created")
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTime>("LastModified")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("PagesRead")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("SeriesId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("VolumeId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("AppUserId");
+
+                    b.ToTable("AppUserProgresses");
+                });
+
+            modelBuilder.Entity("API.Entities.AppUserRating", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("AppUserId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("Rating")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Review")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("SeriesId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("AppUserId");
+
+                    b.ToTable("AppUserRating");
+                });
+
+            modelBuilder.Entity("API.Entities.AppUserRole", b =>
+                {
+                    b.Property<int>("UserId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("RoleId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("UserId", "RoleId");
+
+                    b.HasIndex("RoleId");
+
+                    b.ToTable("AspNetUserRoles");
+                });
+
+            modelBuilder.Entity("API.Entities.Chapter", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<byte[]>("CoverImage")
+                        .HasColumnType("BLOB");
+
+                    b.Property<DateTime>("Created")
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("IsSpecial")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateTime>("LastModified")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Number")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("Pages")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Range")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Title")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("VolumeId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("VolumeId");
+
+                    b.ToTable("Chapter");
+                });
+
+            modelBuilder.Entity("API.Entities.CollectionTag", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<byte[]>("CoverImage")
+                        .HasColumnType("BLOB");
+
+                    b.Property<string>("NormalizedTitle")
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("Promoted")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<uint>("RowVersion")
+                        .IsConcurrencyToken()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Summary")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Title")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("Id", "Promoted")
+                        .IsUnique();
+
+                    b.ToTable("CollectionTag");
+                });
+
+            modelBuilder.Entity("API.Entities.FolderPath", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateTime>("LastScanned")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("LibraryId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Path")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("LibraryId");
+
+                    b.ToTable("FolderPath");
+                });
+
+            modelBuilder.Entity("API.Entities.Library", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("CoverImage")
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTime>("Created")
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTime>("LastModified")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("Type")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Library");
+                });
+
+            modelBuilder.Entity("API.Entities.MangaFile", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("ChapterId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("FilePath")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("Format")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateTime>("LastModified")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("Pages")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ChapterId");
+
+                    b.ToTable("MangaFile");
+                });
+
+            modelBuilder.Entity("API.Entities.Series", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<byte[]>("CoverImage")
+                        .HasColumnType("BLOB");
+
+                    b.Property<DateTime>("Created")
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTime>("LastModified")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("LibraryId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("LocalizedName")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("NormalizedName")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("OriginalName")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("Pages")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("SortName")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Summary")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("LibraryId");
+
+                    b.HasIndex("Name", "NormalizedName", "LocalizedName", "LibraryId")
+                        .IsUnique();
+
+                    b.ToTable("Series");
+                });
+
+            modelBuilder.Entity("API.Entities.SeriesMetadata", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<uint>("RowVersion")
+                        .IsConcurrencyToken()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("SeriesId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("SeriesId")
+                        .IsUnique();
+
+                    b.HasIndex("Id", "SeriesId")
+                        .IsUnique();
+
+                    b.ToTable("SeriesMetadata");
+                });
+
+            modelBuilder.Entity("API.Entities.ServerSetting", b =>
+                {
+                    b.Property<int>("Key")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<uint>("RowVersion")
+                        .IsConcurrencyToken()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Value")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Key");
+
+                    b.ToTable("ServerSetting");
+                });
+
+            modelBuilder.Entity("API.Entities.Volume", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<byte[]>("CoverImage")
+                        .HasColumnType("BLOB");
+
+                    b.Property<DateTime>("Created")
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTime>("LastModified")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("Number")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("Pages")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("SeriesId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("SeriesId");
+
+                    b.ToTable("Volume");
+                });
+
+            modelBuilder.Entity("AppUserLibrary", b =>
+                {
+                    b.Property<int>("AppUsersId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("LibrariesId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("AppUsersId", "LibrariesId");
+
+                    b.HasIndex("LibrariesId");
+
+                    b.ToTable("AppUserLibrary");
+                });
+
+            modelBuilder.Entity("CollectionTagSeriesMetadata", b =>
+                {
+                    b.Property<int>("CollectionTagsId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("SeriesMetadatasId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("CollectionTagsId", "SeriesMetadatasId");
+
+                    b.HasIndex("SeriesMetadatasId");
+
+                    b.ToTable("CollectionTagSeriesMetadata");
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRoleClaim<int>", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("ClaimType")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ClaimValue")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("RoleId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("RoleId");
+
+                    b.ToTable("AspNetRoleClaims");
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserClaim<int>", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("ClaimType")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ClaimValue")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("AspNetUserClaims");
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserLogin<int>", b =>
+                {
+                    b.Property<string>("LoginProvider")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ProviderKey")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ProviderDisplayName")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("LoginProvider", "ProviderKey");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("AspNetUserLogins");
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserToken<int>", b =>
+                {
+                    b.Property<int>("UserId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("LoginProvider")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Value")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("UserId", "LoginProvider", "Name");
+
+                    b.ToTable("AspNetUserTokens");
+                });
+
+            modelBuilder.Entity("API.Entities.AppUserPreferences", b =>
+                {
+                    b.HasOne("API.Entities.AppUser", "AppUser")
+                        .WithOne("UserPreferences")
+                        .HasForeignKey("API.Entities.AppUserPreferences", "AppUserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("AppUser");
+                });
+
+            modelBuilder.Entity("API.Entities.AppUserProgress", b =>
+                {
+                    b.HasOne("API.Entities.AppUser", "AppUser")
+                        .WithMany("Progresses")
+                        .HasForeignKey("AppUserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("AppUser");
+                });
+
+            modelBuilder.Entity("API.Entities.AppUserRating", b =>
+                {
+                    b.HasOne("API.Entities.AppUser", "AppUser")
+                        .WithMany("Ratings")
+                        .HasForeignKey("AppUserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("AppUser");
+                });
+
+            modelBuilder.Entity("API.Entities.AppUserRole", b =>
+                {
+                    b.HasOne("API.Entities.AppRole", "Role")
+                        .WithMany("UserRoles")
+                        .HasForeignKey("RoleId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("API.Entities.AppUser", "User")
+                        .WithMany("UserRoles")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Role");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("API.Entities.Chapter", b =>
+                {
+                    b.HasOne("API.Entities.Volume", "Volume")
+                        .WithMany("Chapters")
+                        .HasForeignKey("VolumeId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Volume");
+                });
+
+            modelBuilder.Entity("API.Entities.FolderPath", b =>
+                {
+                    b.HasOne("API.Entities.Library", "Library")
+                        .WithMany("Folders")
+                        .HasForeignKey("LibraryId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Library");
+                });
+
+            modelBuilder.Entity("API.Entities.MangaFile", b =>
+                {
+                    b.HasOne("API.Entities.Chapter", "Chapter")
+                        .WithMany("Files")
+                        .HasForeignKey("ChapterId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Chapter");
+                });
+
+            modelBuilder.Entity("API.Entities.Series", b =>
+                {
+                    b.HasOne("API.Entities.Library", "Library")
+                        .WithMany("Series")
+                        .HasForeignKey("LibraryId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Library");
+                });
+
+            modelBuilder.Entity("API.Entities.SeriesMetadata", b =>
+                {
+                    b.HasOne("API.Entities.Series", "Series")
+                        .WithOne("Metadata")
+                        .HasForeignKey("API.Entities.SeriesMetadata", "SeriesId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Series");
+                });
+
+            modelBuilder.Entity("API.Entities.Volume", b =>
+                {
+                    b.HasOne("API.Entities.Series", "Series")
+                        .WithMany("Volumes")
+                        .HasForeignKey("SeriesId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Series");
+                });
+
+            modelBuilder.Entity("AppUserLibrary", b =>
+                {
+                    b.HasOne("API.Entities.AppUser", null)
+                        .WithMany()
+                        .HasForeignKey("AppUsersId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("API.Entities.Library", null)
+                        .WithMany()
+                        .HasForeignKey("LibrariesId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("CollectionTagSeriesMetadata", b =>
+                {
+                    b.HasOne("API.Entities.CollectionTag", null)
+                        .WithMany()
+                        .HasForeignKey("CollectionTagsId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("API.Entities.SeriesMetadata", null)
+                        .WithMany()
+                        .HasForeignKey("SeriesMetadatasId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRoleClaim<int>", b =>
+                {
+                    b.HasOne("API.Entities.AppRole", null)
+                        .WithMany()
+                        .HasForeignKey("RoleId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserClaim<int>", b =>
+                {
+                    b.HasOne("API.Entities.AppUser", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserLogin<int>", b =>
+                {
+                    b.HasOne("API.Entities.AppUser", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserToken<int>", b =>
+                {
+                    b.HasOne("API.Entities.AppUser", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("API.Entities.AppRole", b =>
+                {
+                    b.Navigation("UserRoles");
+                });
+
+            modelBuilder.Entity("API.Entities.AppUser", b =>
+                {
+                    b.Navigation("Progresses");
+
+                    b.Navigation("Ratings");
+
+                    b.Navigation("UserPreferences");
+
+                    b.Navigation("UserRoles");
+                });
+
+            modelBuilder.Entity("API.Entities.Chapter", b =>
+                {
+                    b.Navigation("Files");
+                });
+
+            modelBuilder.Entity("API.Entities.Library", b =>
+                {
+                    b.Navigation("Folders");
+
+                    b.Navigation("Series");
+                });
+
+            modelBuilder.Entity("API.Entities.Series", b =>
+                {
+                    b.Navigation("Metadata");
+
+                    b.Navigation("Volumes");
+                });
+
+            modelBuilder.Entity("API.Entities.Volume", b =>
+                {
+                    b.Navigation("Chapters");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/API/Data/Migrations/20210603212429_BookScrollIdProgress.cs b/API/Data/Migrations/20210603212429_BookScrollIdProgress.cs
new file mode 100644
index 000000000..f2be301fe
--- /dev/null
+++ b/API/Data/Migrations/20210603212429_BookScrollIdProgress.cs
@@ -0,0 +1,23 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+namespace API.Data.Migrations
+{
+    public partial class BookScrollIdProgress : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "BookScrollId",
+                table: "AppUserProgresses",
+                type: "TEXT",
+                nullable: true);
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "BookScrollId",
+                table: "AppUserProgresses");
+        }
+    }
+}
diff --git a/API/Data/Migrations/DataContextModelSnapshot.cs b/API/Data/Migrations/DataContextModelSnapshot.cs
index 84a4b2d7d..fafd70de0 100644
--- a/API/Data/Migrations/DataContextModelSnapshot.cs
+++ b/API/Data/Migrations/DataContextModelSnapshot.cs
@@ -142,6 +142,9 @@ namespace API.Data.Migrations
                     b.Property<int>("BookReaderMargin")
                         .HasColumnType("INTEGER");
 
+                    b.Property<int>("BookReaderReadingDirection")
+                        .HasColumnType("INTEGER");
+
                     b.Property<bool>("BookReaderTapToPaginate")
                         .HasColumnType("INTEGER");
 
@@ -177,6 +180,9 @@ namespace API.Data.Migrations
                     b.Property<int>("AppUserId")
                         .HasColumnType("INTEGER");
 
+                    b.Property<string>("BookScrollId")
+                        .HasColumnType("TEXT");
+
                     b.Property<int>("ChapterId")
                         .HasColumnType("INTEGER");
 
diff --git a/API/Entities/AppUserProgress.cs b/API/Entities/AppUserProgress.cs
index 65dd43296..3443a68d1 100644
--- a/API/Entities/AppUserProgress.cs
+++ b/API/Entities/AppUserProgress.cs
@@ -14,6 +14,11 @@ namespace API.Entities
         public int VolumeId { get; set; }
         public int SeriesId { get; set; }
         public int ChapterId { get; set; }
+        /// <summary>
+        /// For Book Reader, represents the nearest passed anchor on the screen that can be used to resume scroll point
+        /// on next load
+        /// </summary>
+        public string BookScrollId { get; set; }
         
         // Relationships
         public AppUser AppUser { get; set; }