iBooks keeps asking for password

I had the same issue, but this solved it for me on my iPhone 5.

Open the iTunes Store on your device and look for an uncompleted downloads. Ironically, mine was actually a song and not a book at all. I completed the download. I am no longer prompted for my iTunes Apple ID Password evertime I launch iBooks. Hope this helps.

Hey Thanks! I checked both iPhone and iPad and sure enough there was "pending" downloads in the iTunes app. I cleared them and signed on to iBooks without having to re-enter password. Still a "Bug" in my book but at least a workable solution.

Solved. Awesome!
Thanks

I had a similar problem and finally found that I had to go to the "store" from the iBooks app and download updates to a few of my books. These updates didn't show up when I looked for pending downloads in the iTunes Store.

This is certainly an annoying quirk of OS7. I imagine it's tied into the new auto updates feature for apps and not functioning properly in iBooks. Maybe some day It will get a fix.

...and if there are no uncompleted download, just log off itunes and log again... 😉

I have the same problem and I *think* it might also be related to pre-orders. I think I'm seeing a correlation between when I've preordered a movie and ibooks asking for my password. I'll try to confirm.. when my preorder arrives.

I don't think it is this, as I don't have any pre-orders but do get prompted for my password each time I launch iBooks on my iPad mini [iOS 7.0.2, iBooks 3.2 (2083)]. Additionally I don't think I have any partial downloads or book updates (not sure where I'd see these, though). There are plenty of books that I've purchased that are in iCloud that aren't downloaded to the device, but surely that can't be the problem, can it? They couldn't possibly want me to have every title I've ever purchased on my device.

I /am/ running 10.9 Mavericks and do have iBooks installed there, for what it's worth, in the event this is a sync-related issue.

For me, it was partial downloads I was unaware of. I also didn't think it would be the case but Voila - there they were. Problem solved.

What a relief. Seems simple with 20/20 hindsight but it was driving me nuts. Yes, pending downloads and updates. Thank you.

Same here. Some song I purchased seemed to be stuck downloading in iTunes. Cleared that and iBooks stopped asking for password. Thank you!!