This comprehensive guide to tween library services begins with a developmental description of this ever-changing group and offers practical advice about materials and programming. Criteria are provided for categorizing books, music, movies and magazines as appropriate for tweens, with special attention given to the reluctant reader. The authors discuss how to determine where tween services fit within the broader spectrum of youth services, and how to provide support for them. Information on marketing and outreach to tweens and their adults completes this essential guide.