Positive Psychology is the scientific study of human happiness. It emphasizes the study of positive emotions, positive personality traits, and positive institutions, in an effort to complement the issues addressed by clinical psychology and psychotherapy, which usually focus on negative emotions and mental illness.

It is the newest and perhaps the fastest growing branch of psychology, because its principles, basic concepts, assumptions, and emerging theories are compatible and complementary to the most important theories of psychology. Positive Psychology seems to enrich the existing theoretical and conceptual models concerning psychotherapeutic change and is compatible with most therapeutic approaches.

The authors of the book focus on how Positive Psychology complements, expands, and therefore improves existing psychotherapeutic models, proving that it can and has room to be integrated into traditional theoretical models concerning psychotherapeutic change and how it is achieved, but also to enrich clinical practice with new tools.

The main questions raised are:

- How can Positive Psychology enrich our understanding of the process of psychotherapeutic change?
- Which therapeutic interventions can be integrated into different psychotherapeutic models with the aim of improving and increasing their effectiveness?
- What are the key elements of Positive Psychology that help the psychotherapist in clinical work?
- How does the integration of the concepts of Positive Psychology help us better understand human nature, the process of change, and the process of healing psychological wounds?

Aiming to fill a gap in the literature on psychotherapy, the book is addressed to students of psychotherapy and counseling, clinical psychologists, psychotherapists, and those who practice or are going to practice psychotherapeutic work, contributing significantly to the dialogue regarding the search for common therapeutic factors, the composition of therapeutic models, and the improvement of therapeutic practices.