diff --git a/manual/edit.rst b/manual/edit.rst
index 2ee915b2de..a6664e1e88 100644
--- a/manual/edit.rst
+++ b/manual/edit.rst
@@ -182,7 +182,7 @@ files into book.
 Replacing files
 ^^^^^^^^^^^^^^^^
 
-You can easily replace existing files int he book, by right clicking on the
+You can easily replace existing files in the book, by right clicking on the
 file and choosing replace. This will automatically update all links and
 references, in case the replacement file has a different name than the file
 being replaced.
diff --git a/manual/plugin_examples/editor_demo/main.py b/manual/plugin_examples/editor_demo/main.py
index 8fb4b1f03b..b4d24d3d39 100644
--- a/manual/plugin_examples/editor_demo/main.py
+++ b/manual/plugin_examples/editor_demo/main.py
@@ -75,7 +75,7 @@ class DemoTool(Tool):
 
         container = self.current_container  # The book being edited as a container object
 
-        # Iterate over all style declarations int he book, this means css
+        # Iterate over all style declarations in the book, this means css
         # stylesheets, <style> tags and style="" attributes
         for name, media_type in container.mime_map.iteritems():
             if media_type in OEB_STYLES:
diff --git a/src/calibre/ebooks/oeb/polish/cover.py b/src/calibre/ebooks/oeb/polish/cover.py
index bf76caa47f..9c35591f88 100644
--- a/src/calibre/ebooks/oeb/polish/cover.py
+++ b/src/calibre/ebooks/oeb/polish/cover.py
@@ -71,7 +71,7 @@ def set_cover(container, cover_path, report=None, options=None):
     Set the cover of the book to the image pointed to by cover_path.
 
     :param cover_path: Either the absolute path to an image file or the
-        canonical name of an image in the book. When using an image int he book,
+        canonical name of an image in the book. When using an image in the book,
         you must also set options, see below.
     :param report: An optional callable that takes a single argument. It will
         be called with information about the tasks being processed.