Leslie Sokol, PhD, is a licensed psychologist, distinguished founding fellow, certified trainer/consultant, past president, secretary, and credentials chair of the Academy of Cognitive Therapy. A fellow of the Association for Behavioral and Cognitive Therapies (ABCT), she was past director of education at the Beck Institute for Cognitive Behavior Therapy for almost fifteen years, and is a highly acclaimed national and international lecturer. Sokol was behavioral science chair of the family practice department at Mercy Suburban Hospital for twenty-two years where she also served as staff psychologist for cardiac rehab, physical rehab, nursing home, hospice, and family practice clinic. Sokol has been training mental health professionals in cognitive behavioral therapy for over thirty years. Her coauthored book, Teaching and Supervising Cognitive Behavioral Therapy is the first comprehensive text to provide effective, empirically validated training and supervision. She is also coauthor of Think Confident, Be Confident; Think Confident, Be Confident for Teens; and two academic, edited book chapters: “Dealing with Difficult Cases” in The Wiley Handbook of Cognitive Behavioral Therapy, and “The Generic Model of Cognitive Behavioral Therapy” in The Science of Cognitive Behavioral Therapy. Sokol is published in peer-reviewed journals. Her private practice is located in the suburbs of Philadelphia, PA.