Brian A. Sharpless, PhD, is an associate professor of clinical psychology at The American School of Professional Psychology at Argosy University, Washington, DC. He has authored over 35 publications on various topics related to psychopathology, psychotherapy, and the history and philosophy of clinical psychology. His previous book, Sleep Paralysis: Historical, Psychological, and Medical Perspectives, co-authored with Karl Doghramji, MD, is also available through Oxford University Press.