This is a book about how to optimise your mental health. Written with kindness and sympathy, it is a practical guide to emotional well-being, calm and psychological maturity. Alain de Botton explores how we can cope with a variety of mental challenges, from the mild to the severe. It considers how and why we can get overly anxious or low; how we can best understand our pasts and how they shape us; and how we can build resilience, so as to live wisely alongside certain difficulties.