The puppy was bugging me for a treat. Me being an old softy, who she has wrapped around her front paw I was trying to get one out of the package, while holding onto my IPad with my other hand. Kleo (yes, she is named after that queen of Egypt and that is the correct spelling) got her treat and when I looked at my IPad there was a strange little white box in IBooks. It looks like a standard text box, the same sort we've been seeing since MacOS, GEOS, GEM, OS2, and the unmentionable OS from Redmond moved computing away from text mode (I'm old - punch cards and main frames are what I learned on).
Problem is that the box sits in the middle of my book shelf, and won't go away. Even worse, when I open a book it is still there! It's a real nuisance when you are reading. Yes, you can work around it. But it is frustrating.
The box doesn't show up in any other application that I've checked.