"The Story of Sandy"--excellent book about therapy with a very young child who was damaged from extremely inconsistent parental care. Amazing story. Written by Susan Stanhope Wexler, who essentially adopted him with her husband.
Works by Torey Hayden, such as "The Tiger's Child"
Virginia Axline--"Dibs in Search of Self"
These are about children and their healing, which I find interesting--how it happens.