The Sleep Parent Training (SLePT) Program was developed for young children with autism spectrum disorder and co-occurring sleep disturbances and tested in clinical trials. The manual is based on behavioral analytic principles and covers approaches to address bedtime challenges, delayed sleep onset, night wakings, sleep association problems, and early morning wakings. The manualized intervention includes a therapist guide and an accompnying parent workbook. The therapist guide is designed to provide session by session guidance and to lead therapists from various backgrounds to help parents to improve their child's sleep concerns. The five session intervention covers an overview of the causes of sleep disturbances in autistic children as well as strategies to address the common behavioral sleep problems experienced by autistic children. This therapist guide includes therapist scripts, activity sheets, and treatment fidelity checklists. It also includes case examples, data collection forms, and a sleep behavior plan. The intervention is intended to be delivered individually, but may be delivered in-person or virtually, and ideas for virtual delivery are included. While manualized, the intervention is designed to allow for personalized tailoring based on the child's age and skills and parent preferences.