The more open file format, EPUB, is easier to use for managing your own library if you get your books from outside the Kindle store, but it’s more difficult to get onto a Kindle than MOBI or KFX.

If you're racing through your stack of TBR books and looking for your next read, do it on a budget. For Kindle users, there are deals to be had on e-books to stock your library. Shop all the best ...