I have a paperback copy of this book. Currently there are no copies available of any of the multiple bindings and upcs of this book title in the pbs system (except for those claimed through wishlists). This copy is unpostable because it got something spilled on it. It doesn't affect the book binding or even the cover really, it just made the first 50 pages wavy and the top edge of the front cover a little wavy. The spill did make the outside of the first ~50 pages (when you are looking at a closed book at the top or side) darker then the rest of the pages on the top and top half of the side, but the spill in no way affected the readability AT ALL. I do not know what was spilled on it, it was returned to me this way from a friend and I forgot to ask what it was, but I would guess maybe coffee from the way the stain is darker on the outside. Anways the book is still completely readable, binding is good and besides the spill in good shape otherwise. I'm asking one credit for it.