About Kevin L. Polk Books by Kevin L. Polk The Essential Guide to the ACT Matrix A Step-by-Step Approach to Using the ACT Matrix Model in Clinical Practice by (author) Kevin L. Polk, Benjamin Schoendorff & Mark Webster The ACT Matrix A New Approach to Building Psychological Flexibility Across Settings and Populations edited by Kevin L. Polk & Benjamin Schoendorff foreword by Kelly G. Wilson
