There system glitched and locked all the books I had read in the past dont us this app they arent worth it. I used the app for 3 years and when i tried to get this glitch figure out there customer support basically told me yeah we aren't competent enough to keep record from the past 3 years so there's nothing we can do. Then even after i gave them proof of purchase they still said nope nothing we can do. So yeah if u wanna get ripped off and spend 200 bucks to read one book us this app.