Hi, everyone. Awhile ago, I was given an iPad from a friend. Instead of completely wiping it and reinstalling all the apps manually, I deleted his Apple ID from it and added mine. Recently, when using it to set up a newer iPad, I noticed it asking me for my friend's password to his Apple ID in order to use stuff he downloaded on iBooks and elsewhere. I've gone in iBooks but can't seem to find anything. Apart from wiping the whole thing and starting over, is there anyway to identify those downloads or material that are associated with his Apple ID and get rid of them? Thanks.