First developed for treating borderline personality disorder, dialectical behaviour therapy (DBT) has proven effective as treatment for a range of other mental health problems, especially for those characterized by out-of-control emotions. Tens of thousands of individuals around the world are receiving DBT or participating in DBT-based support groups, yet to date there are few resources available that are accessible enough for interested individuals to teach themselves the core DBT skills. This book, a collaborative effort from four of New Harbinger's most esteemed authors, fills a conspicuous gap in the DBT literature. It offers general readers and professionals alike straightforward, step-by-step exercises for learning and putting into practice the four core DBT skills: mindfulness, interpersonal effectiveness, emotion regulation and distress tolerance. Whether used to support work done in therapy or as the basis for self-help, this workbook will bring DBT to readers with unrivaled clarity and effectiveness.