I am tyring to download and epub book from my library to my ipad and I keep getting the error "Invalid Title-This application is not currently authorized to open the book. Please verify your Adobe Id and try again. When I sign in with my Adobe ID, I get the message that the authorization is successful, but when I go back and try to download again, I get the Invalid Title error again. How anyone else had this problem?
Which app are you using on ipad.
I find Bluefire the most reliable.