The book governs the American psychological Association (APA), five general principles:Principle A: Beneficence and NonmaleficencePrinciple B: Fidelity and ResponsibilityPrinciple C: IntegrityPrinciple D: JusticePrinciple E: Respect for people Rights and DignityThe 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.