What is the connection between autism and addiction? Why are individuals with autism more likely to develop substance use disorder compared to the general population? Until recently, substance use disorder (SUD) was considered rare among those with autism spectrum disorder (ASD). This book gathers current research and personal testimonies from individuals with autism and their advocates. It explores why addiction is more common among individuals with ASD and investigates how addiction and autism affect each other. The authors also provide strategies for supporting individuals with both ASD and SUD.