Originally published: New York: Scholastic, 2006; London: Scholastic, 2007.
Summary:
Everything goes seriously wrong when George and Harold fall into a parallel universe and run into their very own evil twins. Could this be another job for the amazing Captain Underpants? Partly in graphic novel format.
This resource is supported by the Institute of Museum and Library Services under the provisions of the Library Services and Technology Act as administered by State Library of Iowa.