The fifth edition of this best-selling textbook introduces all of the major theories, research findings, principles and concepts in business psychology and organizational behaviour, whilst emphasising their real-life application using relevant examples. The book, which is well-organized and clearly written, takes the reader through individual, group, and organizational/HR perspectives on the subject, while at the same time offering an appreciation of their historical development and methodological issues. The text has an improved structure and style of presentation, and has been revised and updated with new and expanded material including coverage of: recent debates in occupational psychology; investor psychology or behavioural finance; cognitive evaluation theory; employee engagement and positive psychology; corporate memories in culture; story telling and social media; technostress and environmental influences on stress; and emergent trends in selection. The book "s numerous helpful features include panels which contain relevant theories, research and illustrations of practice; learning outcomes; chapter summaries; review questions; a comprehensive bibliography; and a glossary. For lecturers who adopt the book we provide access to a wealth of teaching resources, including a PowerPoint lecture course, multiple choice question tests, and a set of sample discussions based on selected themes from each chapter. This is an essential textbook for undergraduates and postgraduates studying psychology and organizational behaviour; it will also be welcomed as a rich source of information by practitioners in organizations.