Thoroughly updated, this is the essential guide to one of the most fundamental fields in the library profession. It links you--and through you, your patrons--to the significant changes that have occurred in reference and information sciences with emphasis on the growth of digital content. * Provides a comprehensive text edited by two highly regarded experts in reference and academic librarianship, Linda C. Smith and Melissa A. Wong, with chapters written by some of the best minds in the library science field * Includes newly updated information that reflects today's realities in reference service with an indication of how reference service may be provided to meet changing patron needs in the future * Encompasses the effective use of print sources, free online sources, and fee-based sources * Features individual chapters that can be used for in-service staff training or in student course packs