When Jasper Rabbit finds a purple crayon willing to do his schoolwork for him, he is elated--at first.

Ever since he was cursed by an old carnival game, Rex Dexter has had the ability to communicate with ghostly animals, and this time he is confronted by a roomful of magicians' rabbits who are suddenly dead and want to know why; the Astounding Isabel tellshim that the problem was her malfunctioning magic hat, but she cannot understand why it keeps happening--and soon Rex and his friend Darvish are neck-deep in dead bunnies, and a mystery that just...