Leslie Sokol, PhD, a licensed psychologist, is an internationally recognized leader in the field of cognitive behavioral therapy with more than 35 years of experience in practice, teaching, and research. She is a distinguished founding fellow of the Academy of Cognitive Therapy and a past president. Dr. Sokol has coauthored numerous books and book chapters.

Marci G. Fox, PhD, a licensed psychologist, has been in private practice for over 25 years specializing in cognitive behavioral therapy and has coauthored numerous books. She has worked with the Beck Institute for Cognitive Behavior Therapy for most of her career. As an Academy of Cognitive Therapy founding fellow and Certified Trainer/Consultant, she trains individuals in CBT both nationally and internationally.