Case-based knowledge forms an essential element of the evidence base for counselling and psychotherapy practice. This book provides the reader with a unique introduction to the conceptual and practical tools required to conduct high quality case study research that is grounded in their own therapy practice or training. Drawing on real-life cases at the heart of counselling and psychotherapy practice, John McLeod makes complex debates and concepts engaging and accessible for the trainees and practitioners at all levels, and from all theoretical orientations. Key topics covered in the book include: the role of case studies in the development of theory, practice and policy in counselling and psychotherapy; strategies for responding to moral and ethical issues in therapy case study research; practical tools for collecting case data; 'how-to-do-it' guides for carrying out different types of case study; team-based case study research for practitioners and students; and, questions, issues and challenges that may have been raised for readers through their study.Concrete examples, points for reflection and discussion, and recommendations for further reading will enable readers to use the book as a basis for carrying out their own case investigation. All trainees in counselling, psychotherapy and clinical psychology are required to complete case reports, and this is the only textbook to cover the topic in real depth. The book will also be valuable to people who intend to use existing case studies to inform their practice, and it will help experienced practitioners to generate publishable case reports.