diff --git a/scripts/inject-chapter-navigation-footer b/scripts/inject-chapter-navigation-footer
index 45c9c296..77cb82e5 100644
--- a/scripts/inject-chapter-navigation-footer
+++ b/scripts/inject-chapter-navigation-footer
@@ -32,26 +32,26 @@ spine_titles = [se.easy_xml.EasyXmlTree(open(file_path).read()).xpath("//head/ti
 chapter_links = [{"title": title, "path": path} for title, path in zip(spine_titles, rel_spine_paths)]
 
 # Create helper function for getting filename without extension
-def get_filename_without_extension(obj):
-	return os.path.splitext(obj["path"])[0] if obj else ""
+def get_filename_without_extension(dict_with_path):
+	return os.path.splitext(dict_with_path["path"])[0] if dict_with_path else ""
 
 # Create footers
 for i, chapter_link in enumerate(chapter_links):
-	previousObj = chapter_links[i - 1] if i > 0 else None
-	nextObj = chapter_links[i + 1] if i < len(chapter_links) - 1 else None
+	previous_dict = chapter_links[i - 1] if i > 0 else None
+	next_dict = chapter_links[i + 1] if i < len(chapter_links) - 1 else None
 
-	fileName = os.path.join(ebook_dir, "src/epub", chapter_link["path"])
+	file_path = os.path.join(ebook_dir, "src/epub", chapter_link["path"])
 
-	previous_link_filename, next_link_filename = [get_filename_without_extension(obj) for obj in [previousObj, nextObj]]
+	previous_link_filename, next_link_filename = [get_filename_without_extension(chapter_dict) for chapter_dict in [previous_dict, next_dict]]
 
-	with open(fileName, "r") as file:
+	with open(file_path, "r") as file:
 		chapter = file.read()
 
-	previousLink = f"""<a href="{book_url}/{previous_link_filename}" rel="prev"><i>Previous:</i> {html.escape(previousObj["title"])}</a>""" if previousObj else ""
-	nextLink = f"""<a href="{book_url}/{next_link_filename}" rel="next"><i>Next:</i> {html.escape(nextObj["title"])}</a>""" if nextObj else ""
+	previous_link = f"""<a href="{book_url}/{previous_link_filename}" rel="prev"><i>Previous:</i> {html.escape(previous_dict["title"])}</a>""" if previous_dict else ""
+	next_link = f"""<a href="{book_url}/{next_link_filename}" rel="next"><i>Next:</i> {html.escape(next_dict["title"])}</a>""" if next_dict else ""
 
-	footer = f"<footer><ul><li>{previousLink}</li><li>{nextLink}</li></ul></footer>"
+	footer = f"<footer><ul><li>{previous_link}</li><li>{next_link}</li></ul></footer>"
 	chapter = chapter.replace("</body>", f"{footer}</body>")
 
-	with open(fileName, "w") as file:
+	with open(file_path, "w") as file:
 		file.write(chapter)
\ No newline at end of file