Is it space that children dream of, or merely visiting other worlds? Todd had always set his heart on being an astronaut, but when he meets an alien and travels to another world, he doesn't use a spaceship, he just hangs out in his own back yard.

In Space Boy, Orson Scott Card takes readers into a strange and wonderful future, where people from another world regularly visit Earth - usually without being noticed. And when humans travel to their world, they find themselves dangerously weak and powerless. Until Todd finds a way to set both worlds to rights.