Used to be a great app, over the last few months every now and then it would not let me access my cart and purchase my books. Now it just doesn't work at all, it either keeps loading or says that the store can not be accessed. I've tried to logout, restart my phone, delete and reinstall the app. Nothing works, been like this for 2 weeks now. Update 22 version of the app is absolute garbage. Do not download this trash. This app is dead.