Positive Psychology is a relatively new field that has emerged over the last few decades, With the aim of promoting human strength, virtues, wellbeing, happiness, and resilience in individuals and communities. This field offers a fresh perspective on human nature, focusing on what is going right in people’s live and what they can do to improve their mental health and overall wellbeing. This textbook provides an overview of the concepts, key theories and empirical findings in Positive Psychology.