Radically open-dialectical behavior therapy (RO-DBT) is a breakthrough, transdiagnostic approach for helping clients with extremely difficult-to-treat overcontrol (OC) disorders such as anorexia nervosa, chronic depression, and obsessive-compulsive disorder (OCD). Written by the founder of RO-DBT and never before published, this comprehensive volume outlines the core theories of RO-DBT, and provides a framework for implementing RO-DBT in individual therapy.