Kay Ann Cassell and Uma Hiremath expand on their tremendously successful approach to reference service with this new second edition of their revolutionary text. This practical guide teaches failsafe methods for identifying important materials by matching specific types of questions to the best available sources regardless of format. There's a completely new chapter on using cutting-edge technology plus expanded coverage of marketing reference service, and providing chat and IM reference. Of particular value to practitioners is the discussion of staff competencies needed now and in the future. Reference and Information Service in the 21st Century is comprehensive in its coverage, with sections on fundamental concepts, major reference sources, special topics in reference and information work (including separate chapters on reader's advisory and youth services written by acclaimed expert Mary Kay Chelton who has added coverage of non-fiction), and developing and managing reference collections and services. Fresh material covers pertinent new topics in reference services and technology, including competencies and training in Web site development and maintenance, database evaluation, RSS feeds, blogs, popular social networking sites such as Facebook, and the ability to provide reference service across multiple formats. Guided by a national advisory board of educators and practitioners, this landmark text expertly combines both practical elements and guiding principles, and is sure to useful to LIS educators, students, and both novice and experienced reference professionals.