Hi
A friend purchased a kindle and has downloaded books from the Amazon store. He wants to change the titles of some of the books to shorter names.
I imported all the books into Calibre, I then edited the metadata of the books he wanted to shorten.
I removed these books from the kindle, and then transferred the edited books using Calibre.
However when I go to open them in then Kindle, they will not open for me to read.

Can anyone help me please?