AuDHD is not two conditions. It is one system.For decades, autism and ADHD have been treated as separate diagnoses that sometimes overlap. The result has been confusion, misdiagnosis, and advice that often contradicts itself.This book makes a different argument. Core positioningIn Understanding AuDHD (4th Edition), counselling psychologist Lee Hopkins presents a new framework:AuDHD is not a comorbidityIt is a distinct neurological profileThe interaction is the conditionDrawing on current research, clinical insight, and lived experience, this book explains why the traditional model fails, and what becomes visible when you replace it. What's insideYou'll learn:Why autism + ADHD is the wrong lensThe emerging science behind AuDHD as its own profileWhy executive function feels both rigid and unreliableThe sensory paradox: seeking and avoiding at the same timeThe real cost of masking, including long-term physiological impactHow allostatic load shapes fatigue, burnout, and healthPractical tools for daily life, relationships, and workHow to navigate diagnosis, healthcare, and medication decisions DifferentiationThis is not a surface-level guide.It is:Clinically grounded without being academicDirect without being simplisticHonest about both strengths and costsWritten from inside the experience, not just about itIt challenges the idea that individuals are failing, and asks whether the systems they live in are the real source of strain. AudienceThis book is for:Adults who suspect or know they are AuDHDLate-diagnosed readers trying to reframe their livesClinicians questioning existing diagnostic modelsPartners and family members seeking real understanding CloseIf the existing explanations have never quite fit, this book offers a clearer one.