Stunted — Greg M. Hall

Though he doesn't remember how, Maxwell Steiger screwed up. Waking up under two suns was his first indication. The campfire flowing like molten glass reinforced the point.

His arrival has caused quite a stir, too--some of magical inclination wonder if it's a sign of the End Times. The Coordinator, a shadowy mastermind who stands on the verge of seizing power over Burkand and its surrounding lands, sees it as an opportunity. Such a valuable one that he's employed the Hozelhoff twins, elite assassins of renown, to capture the new arrival.

With the help of a young tagalong of immense magical potential and a Doomsday Prophetess who'd rather not see her visions come to fruition, Maxwell must escape back to our world before he falls in the hands of the Coordinator, or worse: before his presence unravels the weave of magical threads that holds this existence together.