The Heart of Strategy is a book proposal on Game Theory. This book tackles the subject from a psychological angle, using dynamic illustrations and pictorial type in favor of a textbook look and feel. Many real-life applications of Game Theory, such as splitting a bill or negotiating the impact of a consequence are covered. Furthermore, each chapter highlights Game Theory applied in a game. The Heart of Strategy aims to educate its readers, all while reminding them that Game Theory is based on interpersonal qualities.