This new book, written by Ronald Leaf, Ph.D, Justin B. Leaf, Ph.D, and John McEachin, Ph.D provides insight into the past, present and potential future of behavior analysis treatment in autism. Written in the spirit of progress and flexibility, Clinical Judgement presents a thoughtful and encouraging history of those who paved the way in pioneering Applied Behavior Analysis and explains how and why the field was able to develop as it did. Part 2 then goes on to examines possible regressions in the field, despite its foundations of progress and innovation, while Part 3 emphasizes the importance of clinical judgement in practice, both today and in the future. Both inspiring and controversial, Clinical Judgement is a fascinating and enjoyable read for any ABA practitioner.