OCD is particularly prevalent in young people with ASD. This workbook, structured as a flexible 20-session programme, adapts CBT treatment to the specific needs of young people with OCD and ASD. The workbook uses simple illustrations and diagrams to explain ways to challenge OCD thoughts and behaviours and includes fun and engaging activities for use within sessions and at home. An essential resource for clinicians treating young people with OCD and ASD, it will encourage and engage the young person in their recovery process. This workbook is intended to be used in conjunction with the clinical manual for this title, Challenging OCD in Young People with ASD: A CBT Manual for Therapists.