This neurodiversity-informed handbook provides clinicians with a way to think, talk, and write about the autism spectrum brain style in positive, descriptive language that is tailored to the needs of individual clients. Each chapter provides readers with compelling and instantly recognizable ways to reveal the autistic brains’ strengths and differences, reframe behavioural patterns using neuro-affirming language, and link those descriptions to practical, positive supports. The book includes a glossary of descriptive terms and a variety of templates that hold the client’s lived experience at the center of treatment while allowing for individualized treatment and support based on the client’s age and verbal fluency. This book is an ideal resource for clinicians who wish to reframe diagnosis into a strength-based narrative and partner with clients to support self-determined needs.