The book governs the American psychological Association (APA), five general principles: Principle A: Beneficence and Nonmaleficence Principle B: Fidelity and Responsibility Principle C: Integrity Principle D: Justice Principle E: Respect for people Rights and Dignity The book also addresses the Assessment Process, and the historical influences of understanding human behavior. The book further describes the evolution of Health Psychology & Case Studies on Psychotherapy.