Jim & Me — Dan Gutman

What would you do if your worst enemy asked you for a favor?

Bobby Fuller, the meanest kid ever to play ball, wants Stosh to take him back in time to meet his great-grandfather, the Native American Jim Thorpe. Once known as the greatest athlete in the world, Thorpe lost his Olympic medals in a scandal, and his name was forever disgraced.

Stosh reluctantly agrees, but he can't help being nervous. Sure, he'll get to meet Christy Mathewson, John McGraw, and the rest of the New York Giants, but will he be able to save Jim Thorpe's reputation? And considering who's coming with him, will Stosh make it back to his own time in one piece?