This volume describes the foundational and functional competencies underlying "geropsychology," the area in professional psychology that focuses on the psychological and behavioral aspects of aging. Because of the demand for competent psychological services growing within the United States as a function of the aging of the population, the Commission for the Recognition of Specialties and Proficiencies in Professional Psychology recently has designated professional geropsychology as a specialty. Based in large part on the Pikes Peaks model for training in professional geropsychology, this book includes multiple chapter authors under the expert editorship of Victor Molinari. As described in chapter 1, "the ultimate goal of geropsychology is to apply scientific findings about psychological aging to improve the lives of older adults". Psychologists interested in working with older adults will find this volume both educational and aspirational.