ISBN 9780374305505 challenge

[Chaos]

This book has 217 pages.

Worldcat link and Goodreads says 224.
http://www.worldcat.org/title/summer-...

I have all four eyes on and the last page number is 217. When you turn that page there is no writing on the back, nor is there any writing on either side of the next page, which is also the last page. Triple checked ISBN, scanned barcode into Goodreads. I'm perplexed. Thoughts?

[Chaos]

Thank you! Much appreciated.