Gerrold, a science fiction writer from California, adopts a son who has a slight behavioral problem. He believes himself to be a Martian. Gerrold begins the long, involving work of trying to earn the acceptance of Dennis, a hyperactive eight-year-old who desperately wants a father's love, but is so insecure he feels he must be an alien. Gerrold's semi-autobiographical memoir of the first two years with Dennis is a funny, endearing, heartbreaking, and beautifully written testament to fatherhood.