Edited 3/2022 - Now, I can no longer use this app. It has been changed so it is not compatible with my tablet. I did not request an update, Google just removed it from my tablet. I have over 2000 books that I can no longer access. I discussed the issue with Amazon and they can't help. Thanks so much! I recently retired and can NOT afford to purchase a new tablet. Especially not every time a modification is made to an app. Too bad I can't transfer the kindle books to Google books or Nook books. Currently (at least for now), I can read the few books that I have for those apps. This app deserves zero or even negative stars! The latest modification ruined the app. Only the last book downloaded or read is displayed on the screen. They removed the carousel display and now most of the page is advertisement. You can choose to see all your books or just the ones on your device (if you can figure out how). The categories are gone! All the time you spent organizing your books, erased! I was reading several series but now they are mixed in with all the other books and not in the order the series was written. The worst part about this, is that I had no choice about the change. I wasn't allowed to keep the previous version or even made aware of the changes that were made until I opened the app. I am so unhappy with Amazon that I would delete my account if I could keep all the books I purchased, but that's not possible. All I can do is buy any new books from other sources. Editing 11/23 to add that the sync feature does not work. Not only that, this version doesn't even keep track of the pages read. You have to guess where you left off, using the index and skipping through the pages. I hate this app.