Stewart, Paul (2003). Muddle Earth. 450 pages. Grades 4-6.
Joe Jefferson can't think of what to write for his English assignment, which needs to be about an adventure. When he goes outside for a walk with his dog, he suddenly becomes part of another world, Muddle Earth, where he must play the role of warrior-hero. It is now up to Joe and his new friends to stop Dr. Cuddles from imprisoning the wizards and ruling Muddle Earth.