Offering a unique philosophical, theoretical and process-focused introduction to one of the cornerstones of CBT: assessment and case formulation. Updated and expanded to take account of the vast developments in the field of CBT since its first publication, this second edition follows a clear two part structure: - Part One introduces trainees to the key theory, practice and processes of assessment and case formulation - Part Two provides practical illustrations of the theory through 12 extended case studies, considering both 'simple' and 'complex' presenting issues. Each of these chapters follows a set structure to enable easy comparison. Offering all they need to know about this crucial part of their training, this is essential reading for trainees on any CBT course.