Gr l-4 When her parents adopt a baby boy, seven-year-old Sarah voices ques tions about her own adoption as an infant. The clearly welcome addition of a sibling, combined with the open and loving way in which Sarah's adoption has been dis cussed throughout her life, result in a posi tive and relaxed picture of adoption: par ents are the people who love and care for children, whether or not they give birth to them. (Adults will welcome the use of the word ``uterus,'' instead of ``stomach'' as the place where an unborn baby grows.) Unlike most books about adoption, the story does not center on an identity crisis on the part of the adopted child. Sarah's parents and extended family explain that everyone is special, not because of the way he or she joins a family, but because of each person's uniqueness and loving behavior. A black-and-white photograph faces each page of minimal text in this gentle and loving look at adoption. Mar guerite F. Raybould, Glendale Public Li brary, Calif.