diff --git a/src/calibre/gui2/book_details.py b/src/calibre/gui2/book_details.py
index 6cdc39d7ac..cd26ed8953 100644
--- a/src/calibre/gui2/book_details.py
+++ b/src/calibre/gui2/book_details.py
@@ -1271,34 +1271,14 @@ class DetailsLayout(QSplitter):  # {{{
         cover.do_layout()
 # }}}
 
+# Drag 'n drop {{{
 
-class BookDetails(DetailsLayout):  # {{{
-
-    show_book_info = pyqtSignal()
-    open_containing_folder = pyqtSignal(int)
-    open_data_folder = pyqtSignal(int)
-    view_specific_format = pyqtSignal(int, object)
-    search_requested = pyqtSignal(object, object)
-    remove_specific_format = pyqtSignal(int, object)
-    remove_metadata_item = pyqtSignal(int, object, object)
-    save_specific_format = pyqtSignal(int, object)
-    restore_specific_format = pyqtSignal(int, object)
-    set_cover_from_format = pyqtSignal(int, object)
-    compare_specific_format = pyqtSignal(int, object)
-    copy_link = pyqtSignal(object)
-    remote_file_dropped = pyqtSignal(object, object)
+class DropMixin:
     files_dropped = pyqtSignal(object, object)
-    cover_changed = pyqtSignal(object, object)
-    open_cover_with = pyqtSignal(object, object)
-    cover_removed = pyqtSignal(object)
-    view_device_book = pyqtSignal(object)
-    manage_category = pyqtSignal(object, object)
-    edit_identifiers = pyqtSignal()
-    open_fmt_with = pyqtSignal(int, object, object)
-    edit_book = pyqtSignal(int, object)
-    find_in_tag_browser = pyqtSignal(object, object)
+    remote_file_dropped = pyqtSignal(object, object)
 
-    # Drag 'n drop {{{
+    def __init__(self):
+        self.setAcceptDrops(True)
 
     def dragEnterEvent(self, event):
         md = event.mimeData()
@@ -1344,10 +1324,35 @@ class BookDetails(DetailsLayout):  # {{{
 
     # }}}
 
+
+class BookDetails(DetailsLayout, DropMixin):  # {{{
+
+    show_book_info = pyqtSignal()
+    open_containing_folder = pyqtSignal(int)
+    open_data_folder = pyqtSignal(int)
+    view_specific_format = pyqtSignal(int, object)
+    search_requested = pyqtSignal(object, object)
+    remove_specific_format = pyqtSignal(int, object)
+    remove_metadata_item = pyqtSignal(int, object, object)
+    save_specific_format = pyqtSignal(int, object)
+    restore_specific_format = pyqtSignal(int, object)
+    set_cover_from_format = pyqtSignal(int, object)
+    compare_specific_format = pyqtSignal(int, object)
+    copy_link = pyqtSignal(object)
+    cover_changed = pyqtSignal(object, object)
+    open_cover_with = pyqtSignal(object, object)
+    cover_removed = pyqtSignal(object)
+    view_device_book = pyqtSignal(object)
+    manage_category = pyqtSignal(object, object)
+    edit_identifiers = pyqtSignal()
+    open_fmt_with = pyqtSignal(int, object, object)
+    edit_book = pyqtSignal(int, object)
+    find_in_tag_browser = pyqtSignal(object, object)
+
     def __init__(self, vertical, parent=None):
         super().__init__(vertical, parent)
+        DropMixin.__init__(self)
         self.last_data = {}
-        self.setAcceptDrops(True)
         self._layout = self
         self.current_path = ''
 
diff --git a/src/calibre/gui2/dialogs/book_info.py b/src/calibre/gui2/dialogs/book_info.py
index 309c92b8bd..a82b7dd039 100644
--- a/src/calibre/gui2/dialogs/book_info.py
+++ b/src/calibre/gui2/dialogs/book_info.py
@@ -36,7 +36,7 @@ from qt.core import (
 from calibre import fit_image
 from calibre.db.constants import RESOURCE_URL_SCHEME
 from calibre.gui2 import BOOK_DETAILS_DISPLAY_DEBOUNCE_DELAY, NO_URL_FORMATTING, gprefs
-from calibre.gui2.book_details import create_open_cover_with_menu, details_context_menu_event, render_html, resolved_css, set_html
+from calibre.gui2.book_details import DropMixin, create_open_cover_with_menu, details_context_menu_event, render_html, resolved_css, set_html
 from calibre.gui2.ui import get_gui
 from calibre.gui2.widgets import CoverView
 from calibre.gui2.widgets2 import Dialog, HTMLDisplay
@@ -169,7 +169,7 @@ class DialogNumbers(IntEnum):
     DetailsLink = 2
 
 
-class BookInfo(QDialog):
+class BookInfo(QDialog, DropMixin):
 
     closed = pyqtSignal(object)
     open_cover_with = pyqtSignal(object, object)
@@ -177,6 +177,9 @@ class BookInfo(QDialog):
     def __init__(self, parent, view, row, link_delegate, dialog_number=None,
                  library_id=None, library_path=None, book_id=None):
         QDialog.__init__(self, parent)
+        DropMixin.__init__(self)
+        self.files_dropped.connect(self.on_files_dropped)
+        self.remote_file_dropped.connect(self.on_remote_file_dropped)
         self.dialog_number = dialog_number
         self.library_id = library_id
         self.marked = None
@@ -185,6 +188,7 @@ class BookInfo(QDialog):
         self._l = l = QVBoxLayout(self)
         self.setLayout(l)
         l.addWidget(self.splitter)
+        self.setAcceptDrops(True)
 
         self.cover = Cover(self, show_size=gprefs['bd_overlay_cover_size'])
         self.cover.copy_to_clipboard_requested.connect(self.copy_cover_to_clipboard)
@@ -297,6 +301,14 @@ class BookInfo(QDialog):
         except Exception:
             pass
 
+    def on_files_dropped(self, event, paths):
+        gui = get_gui()
+        gui.iactions['Add Books'].files_dropped_on_book(event, paths)
+
+    def on_remote_file_dropped(self, event, url):
+        gui = get_gui()
+        gui.iactions['Add Books'].remote_file_dropped_on_book(event, url)
+
     def geometry_string(self, txt):
         if self.dialog_number is None or self.dialog_number == DialogNumbers.Slaved:
             return txt