This step-by-step guide, from expert professionals, helps clinicians develop formulation-driven cognitive behavioural therapy (CBT) that is individually tailored to adult ADHD clients. Despite a growing number of adults being diagnosed with ADHD and seeking mental health services, clinicians continue to express a lack of confidence in being able to offer effective support. Given the uniqueness of each ADHD client's experiences, this book sets out an approach for professionals to work with individuals to co-develop tailored CBT interventions rather than a using a 'one size fits all' approach. In a clear, step-by-step manner clinicians are guided through the three stages of therapy from Assessment and Therapy, Planning to Active Therapy, and finally Ending Therapy and Looking Ahead. Client handouts at the end of the book also form useful materials for providing further information to clients and recording the therapy process. Taking a neuro-affirmative approach, this book will allow clinicians to support their clients to see their ADHD characteristics as differences not deficits.