Not really printing error but I'm trying to figure out if this book is supposed to be this way.  I picked up a copy of Luncheon of The Boating Party by Susan Vreeland at the UBS.  I didnt' notice until I got it home that for about an inch down on the top the pages are yellow. It's uniform and only seen when the book is closed. When you look at the pages there is no yellow.  It's just like a band going across the top edge of the pages.  The fact that it's all the pages, only on the edge and in a uniform straight line makes me think it was publlished this way.  I was hoping maybe someone else had a copy and they could check theirs.

Maybe it's exposure to the sun?  I have some books that are near a window and they get yellow after a time.  Some paper doesn't age well!

Ruth