I would give this app no stars if I could. After years of reading ebooks, what I find the most disturbing about this app is the poor way the app functions. For the most part the library and the way it is organized is terrible. Books I know that I purchased disappear. I have to search the ebook in search bar only to find that the search says the ebook is already in my library. I have to click on the ebook from the search bar to then see it in my library with my other ebooks. Improve this app!