Magic Tree House
Junie B. Jones
Joe Jefferson is an ordinary schoolboy from ordinary Earth. At least, he was. But something strange happened when he was walking his dog, and now he's Joe the Barbarian—fearless warrior-hero, summoned by Muddle Earth's leading wizard* to slay ogres, wrestle dragons, and bravely confront villains.
Joe doesn't feel much like a warrior-hero.** But evil is stirring in the heart of Elfwood, and the people of Muddle Earth need help (although most of them don't know it yet). Perhaps Joe Jefferson really is a hero after all. . . .
* Actually, Muddle Earth's only wizard. And he's not very good.
** He doesn't really look much like one either.
From the Hardcover edition.