It would be great if not
Idk if it happened to only me, but I have signed for one month free subscription, and they deleted all my Books by two weeks in a month. Now, if I want to continue reading them, I need to pay monthly fee. How should I know that this is not common thing you are doing? What if I read Books and you just random lt delete them whenever you feel like? I am not going to continue my friendship with this app, but I loved it in the beggining and recommended it to everyone.