Book excerpt: The IAAP Handbook of Applied Psychology, an up-to-date and authoritative reference, provides a critical overview of applied psychology from an international perspective. Brings together articles by leading authorities from around the world Provides the reader with a complete overview of the field and highlights key research findings Divided into three parts: professional psychology, substantive areas of applied psychology, and special topics in applied psychology Explores the challenges, opportunities, and potential future developments in applied psychology Features comprehensive coverage of the field, including topics as diverse as clinical health psychology, environmental psychology, and consumer psychology