I've been struggling to delete the books I accidentally copied to my phone for several months. All were deleted except for one pdf, which has multiplied to the point that it shows in iBooks dozens of times each of which cannot be selected for deletion. I've tried backing up the phone and reloading it with books deselected but the books do not show in the phone within iTunes. And when I restore the phone from the backup I discover that instead of these PDFs being gone that they've instead reproduced. I have a lot of data on the phone that would be extremely difficult to reproduce if I'm forced to start from scratch. Do I have any recourse at all?