Michael A. Tompkins, PhD, ABPP, is a board-certified psychologist in behavioral and cognitive psychology. He is codirector of the San Francisco Bay Area Center for Cognitive Therapy, and a faculty member of the Beck Institute for Cognitive Behavior Therapy. Tompkins is author or coauthor of fifteen books, and presents to national and international audiences on cognitive behavioral therapy (CBT) and related topics. His work has been highlighted by media outlets, including in The New York Times, The Wall Street Journal, on television (TLC, A&E), and on radio (KQED, NPR). Tamara L. Hartl, PhD, is an independent clinical practitioner in Saratoga, CA, and a psychologist at the VA Palo Alto Health Care System. She has coauthored several seminal publications on hoarding behavior, including the first cognitive-behavioral model for the treatment of compulsive hoarding with Randy Frost. She specializes in the treatment of anxiety disorders and sexual dysfunction as well as compulsive hoarding. read an excerpt Read an interview Randy O. Frost, PhD, teaches abnormal psychology at Smith College in Northampton, MA. He is coauthor of Buried in Treasures. Gail Steketee, PhD, is a professor and co-chair in the department of clinical practice at the School of Social Work at Boston University. She is coauthor of Buried in Treasures.