Sure, he's cute. Of course you can keep him. But heed these three warnings: Don't ever get him wet. Keep him away from bright light. And the most important thing, the one thing you must never forget: no matter how much he cries, no matter how much he begs . . . never, never feed him after midnight. With these mysterious instructions, young Billy Peltzer takes possession of his cuddly new pet. He gets a whole lot more than he bargained for.