This latest update on not being able to buy books through debit or credit but only credits you have is beyond dumb. Some books aren't worth using a credit on but worth just buying. The price of credits also went up a fair amount from before. I'm just really disappointed with this move because I love using this app and service for years. I had to lower this to a one star after realizing I could buy the books with the deals through the Amazon app. This is crazy I need to use two apps for this.