Horace

Horace is adopted. He is also spotted, and he is loved and cared for by his new mother and father--who are striped. But, as is frequently the case with adopted children who are ``different'' (``My spots are silly. . . and I'm all the wrong colors''), Horace feels the need to search out his roots. And although he does find a brood that resembles him physically, it is not a family that truly loves him. Once again, Keller ( Goodbye, Max ; Henry's Happy Birthday ) deals with a sensitive subject in a way that is perceptive but not sentimental. Her text is suitably straightforward: ``We liked your spots, and we wanted you to be our child,'' says Mama in her customary bedtime story. The bright, boldly colored illustrations feature a lively animal cast and numerous amusing details, such as cat's-paw slippers beside Horace's bed. Youngsters will love Horace as they absorb his subtle message; even parents may find a small lump in their throats. Ages 4-up. (Apr.)