Be aware: This item is described as 'Library Binding'. It is NOT. Library binding' references a specially produced hardcover book with a substantially reinforced spine. Library binding means the covers are acrylic coated fabric covered boards, with heavy paper on the insides. The binding should be a stitched block with reinforcing paper tapes at the hinges. What I received were thin paperback books. **Please note--nothing is wrong with the content of the book** Jump/POGO publishing creates wonderful non-fiction content for young readers. And they *do* produce high quality, library bound books. But these are not bound that way. I was ordering these for expected heavy circulation and handling, and these simply would not survive. I ordered a number of other titles from this series--all listed here as 'library binding.' They haven't arrived yet, but as they were all the same price, I suspect that they will all be paperbacks. Very disappointed. I will visit the POGO website to see if the library bound editions can be gotten there.