Clark, D.A. (2020). Cognitive-Behavioral Therapy for OCD and Its Subtypes. New York: Guilford Press.

This book is an extensive revision of Cognitive-Behavior Therapy for OCD published by Guilford in 2004.  There are updated and expanded chapters on exposure and response prevention for OCD, new chapters on the therapeutic relationship and case formulation, and new chapters dedicated to the four major subtypes of OCD; contamination, doubt, repugnant obsessions, and symmetry/order/rearranging.  The second eition places greater emphasis on clinical skills, highlighting how some of the latest research findings in OCD has changed how  CBT should be delivered to indivdiuals with OCD.