This is a book about preschoolers_three and four-year-old children_and libraries. Even though the major focus of the book is on service in public libraries, librarians and media specialists who work in schools with preschoolers should find much of what is said useful. The author presents a compilation of salient developmental characteristics of three- and four-year-old children, followed by implications for library programs drawn from these characteristics. Its purpose is to help eliminate some of the trial and error librarians resort to when searching for an appropriate match between the child and the library program.