Libby on Wednesday

It's no wonder that Libby McCall has trouble adjusting to Morrison Middle School. She is smaller, younger and brighter than most of the other seventh graders, and she has received the majority of her education at home from the eccentric adults at her grandfather's mansion. From the first day of school, Libby feels like an outcast. After winning first prize in a literary contest, she joins a writers' workshop and finally finds her niche. In the intimate setting of a small class, she gains confidence, develops friendships and eventually helps a boy who has been physically abused. With sympathy and understanding, Snyder ( The Egypt Game ; The Witches of Worm ) conveys the self-consciousness of adolescence as she traces the process of Libby's socialization. Offering deft writing and a cast of endearing characters, this thoughtful tale provides insight into preteen relationships and concerns. Ages 10-14. (Mar.)