People with autism are at a higher risk of developing OCD, with research showing that up to 37% of young people with ASD also have comorbid OCD. This manual offers a step-by-step guide to an evidence-based treatment based on CBT and exposure and response prevention techniques that is specifically designed to suit the needs of young people with ASD. Providing an adaptable 20-session programme for professionals treating young people with OCD and ASD, this book from the national specialist OCD Service at the Maudsley Hospital provides a complete guide for treatment, from introducing what OCD is through to relapse prevention strategies. Designed to be used in conjunction with the workbook, Challenge Your OCD!: A CBT Workbook for Young People with ASD.