Strikingly clear, humane and helpful, this is an essential book for anyone seeking to understand autism and the autistic spectrum. Drawing on many years of clinical experience and research, as well as the testimonies of autistic people, it is an up-to-the minute account of the many indicative features of autism and how they have been assessed and treated over almost a century. As rates of autism diagnosis escalate in almost all high-income countries, researchers today mostly agree that there is no single cause or even single clinical picture of autism. Rather than a neat and well-defined entity, autism is described as a spectrum or constellation of traits, varying in intensity, distribution and severity, with practically everyone in the general population showing at least some autistic trait or feature. At the same time, there has been a radical split between the ways in which autism is perceived. For many, it is a disorder, a pathology based on a deficit, whereas for others it is an identity, a natural variation in human cognitive and behavioural diversity. For anyone facing the special challenges of autism, it can be hard to find clarity amid such complexity and contradiction, making Darian Leader’s illuminating guide to the field of autism research and treatment particularly welcome. 'One of our most important contemporary thinkers' Guardian