This book raises awareness of the importance of recognising and supporting autism with co-occurring conditions. Autism in Complex Presentations brings together international clinicians and researchers with expertise across a range of neurodevelopmental conditions to provide an evidence-based practical guide on autism assessment. It covers conditions where autism may be hard to recognise and where there are challenges around selecting, administering, and interpreting standard assessments for autism and making diagnoses. Each chapter has an easily accessible case vignette to bring the theory into practice and seeks to share the voices and experience of a young person and their family. There is focus on the challenges experienced in accessing and navigating the assessment process and how an autism diagnosis may have helped with support. This book will be relevant to clinicians including Paediatricians, Paediatric Neurologists, Child, Adolescent and Adult Psychiatrists, Clinical Psychologists, Paediatric Neuropsychologists, Speech and Language Therapists, Physiotherapists, Occupational Therapists, Specialist Nurses, Educational Psychologists, and students. It is not written specifically for people affected by autism, although they may be interested to read the book in its entirety or specific chapters.