diff -urp alexandria-book-collection-manager-0.7.4.old/lib/alexandria/ui/book_properties_dialog.rb alexandria-book-collection-manager-0.7.4.new/lib/alexandria/ui/book_properties_dialog.rb
--- alexandria-book-collection-manager-0.7.4.old/lib/alexandria/ui/book_properties_dialog.rb	2019-10-25 01:20:07.000000000 +0900
+++ alexandria-book-collection-manager-0.7.4.new/lib/alexandria/ui/book_properties_dialog.rb	2020-01-15 14:34:40.160543409 +0900
@@ -34,9 +34,10 @@ module Alexandria
         @button_box << help_button
         @button_box.set_child_secondary(help_button, true)
 
-        @entry_title.text = @book_properties_dialog.title = book.title
+        book_title = book.title.force_encoding('UTF-8')
+        @entry_title.text = @book_properties_dialog.title = book_title
         @entry_isbn.text = (book.isbn || "")
-        @entry_publisher.text = book.publisher
+        @entry_publisher.text = book.publisher.force_encoding('UTF-8')
         @entry_publish_date.text = book.publishing_year.to_s
         @entry_publish_date.signal_connect("focus-out-event") do
           text = @entry_publish_date.text
@@ -54,7 +55,7 @@ module Alexandria
             end
           end
         end
-        @entry_edition.text = book.edition
+        @entry_edition.text = book.edition ? book.edition.force_encoding('UTF-8') : ""
         if book.tags
           @entry_tags.text = book.tags.join(",") # tags are comma-separated
         end
diff -urp alexandria-book-collection-manager-0.7.4.old/lib/alexandria/ui/ui_manager.rb alexandria-book-collection-manager-0.7.4.new/lib/alexandria/ui/ui_manager.rb
--- alexandria-book-collection-manager-0.7.4.old/lib/alexandria/ui/ui_manager.rb	2020-01-14 16:14:43.703190269 +0900
+++ alexandria-book-collection-manager-0.7.4.new/lib/alexandria/ui/ui_manager.rb	2020-01-15 14:30:29.284927911 +0900
@@ -427,7 +427,7 @@ module Alexandria
       end
 
       def set_status_label(txt)
-        @status_label.text = txt
+        @status_label.text = txt.force_encoding('UTF-8')
       end
 
       def on_books_selection_changed