I loved this app until the recent update. The ability to buy a book that was cheaper than the cost of a credit is now gone. Navigating to books and books series is now harder or not existent. The app used to allow you to click on the series and get a list of books in that series. That doesn't work anymore, now you have to click on the author. If multiple authors are in a series it makes it harder to find books. Overall this update is a money grab and removes useful navigation options.