This book provides an in-depth exploration of formulation within psychological practice. The authors offer a nuanced overview of different theoretical approaches, including cognitive-behavioural, psychodynamic, systemic, and narrative perspectives, allowing readers to appreciate the diversity and flexibility of formulation. One of the book’s key strengths lies in its emphasis on collaboration and the co-construction of meaning between client and practitioner, which reflects the core values of counselling psychology. Johnstone and Dallos also critically examine the limitations of diagnostic models, highlighting the importance of understanding distress within social, cultural, and relational contexts. This critical stance encourages reflective and ethical practice, prompting practitioners to remain aware of issues of power, labelling, and individualisation. While the book is dense in parts, its clear structure and use of case examples make it both accessible and practically relevant. Overall, it is an essential resource for trainee counselling psychologists, offering both theoretical depth and practical guidance for developing formulation skills that are integrative, reflective, and person-centred.