-Number one text for depth and comprehensive coverage: detailed analysis of existing knowledge and practice -Comprehensively updated in 7th edition with latest research findings, theoretical developments and applications to practice. -Well structured and easily navigable: topic areas clearly defined and packaged to fit course delivery -Unmatched authority: highly recognized author and five previously successful editions -Links theory to practice to help students learn and apply key skills -Offers a strong UK-originated alternative to other US-oriented texts -Flexible and cross-disciplinary: applies to a broad range of professional roles and contexts