It is now 25 years since the first edition of Person-Centred Counselling in Action appeared, offering the definitive exposition of the theory and practice of the person-centred approach. Since then the book has supported and inspired hundreds of thousands of trainees and practitioners worldwide. This important Fourth Edition maintains the book's accessibility, clarity and verve whilst incorporating new developments in the approach. John McLeod joins authors Dave Mearns and Brian Thorne to contribute an exciting new chapter on research relevant to the person-centred field. Person-Centred Counselling in Action, Fourth Edition will be an invaluable resource for those embarking on their first stages of training. Well-established practitioners and even seasoned scholars will continue to find much to interest and stimulate them. Dave Mearns is professor of counselling and retired Director of the Counselling Unit of the University of Strathclyde. He has written seven books including Working at Relational Depth in Counselling and Psychotherapy (with Mick Cooper) and is co-editor of the international journal, Person-Centered and Experiential Psychotherapies. Brian Thorne is Emeritus Professor of Counselling at the University of East Anglia, Norwich where he was previously Director of Counselling and of the Centre for Counselling Studies. He is also a Co-founder of the Norwich Centre and continues to work there as a Professional Fellow. John McLeod is Emeritus Professor of Counselling at the University of Abertay Dundee and adjunct Professor of Psychology at the University of Oslo, Norway.