This document discusses libraries providing services in virtual worlds like Second Life. It notes that Second Life has over 14 million users and functions like a complete society. The Alliance Virtual Library project started in 2006 to provide library services to Second Life residents, and has grown to include nearly 50 library islands and over 1000 librarian avatars. The document outlines the services libraries provide in Second Life, including reference help, programming, collections, and training. It also discusses challenges like volunteer burnout and the need for hardware, as well as benefits like networking and promoting reading.