People are living longer, and the elder population is growing larger. To meet the ongoing need for quality information on elder health, this book combines multiple perspectives to offer readers a more accurate and complete picture of the aging process. The book takes a biopsychosocial approach to the complexities of its subject, and all chapters and entries include references and resource lists. The book includes entries on not-quite-elders’ concerns (e.g., midlife crisis, menopause). The Encyclopedia has been developed for maximum utility to clinicians, social workers, researchers, and public health professionals working with older adults.