Erethizon Dorsatum—better known as Ereth, the self-centered, foul-tempered old porcupine—is having a birthday. And he fully expects his best friend Poppy, a deer mouse, to help him celebrate in a grand manner. But Poppy has gone off somewhere with her husband, Rye, and it appears she has forgotten all about it. "Belching Beavers," says Ereth, "I am not angry!" (Though, perhaps he is—and more than just a little.)