Quote:
Originally Posted by j.p.s
What happens if you overwrite the generic cover thumbnail with a custom cover thumbnail of your choosing with the same name?
|
You can't do it, except with very old firmware.
Modern Kindle firmware won't even look for a thumbnail image if the book is in azw3 format and marked as a personal document. And if you change the file so that it is a "book" instead of a "document" you lose the ability to sync reading position and notes.