This is the first book to bring together the evidence base from leading researchers and clinicians at international level on the forensic needs of people with neurodevelopmental disorders. We hope the readers will find the evidence presented in this book not only informative but a useful reference source for their day-to-day clinical practice. There are many themes running throughout the book but one key one is that people with neurodevelopmental disorders present to the forensic system as complex, with more than one health and social care need. Another theme is the challenge of how best to recognise people with neurodevelopmental disorders across the different parts of the criminal justice system, ensuring there is expertise to provide assessments early on in the journey of defendants. The availability of evidence-based treatments needs to be embedded across forensic settings including correctional settings, health facilities and community-based services.