A library can be a tremendous resource for teens--one that helps them to learn about themselves and the world they live in. But teenagers are intrinsically different from children and from adults, and these critical developmental differences affect the ways they interact with others, both in the world at large and in the library. Serving teens effectively in the library requires a basic understanding of who teens are and the developmental tasks they face--factors that affect all aspects of library service, from the specific programs and services we offer to the ways that staff provide...