'A well-researched, clearly written book... Clarkson and Mackewn did a splendid job organising the theoretical material... Their judicious use of graphics enhances their discussions... The chapter on Perls' contributions to practice is nicely peppered by samples of his actual therapy work and this is true for other chapters. This, I imagine, is how Fritz would have liked it: to let his work speak for itself... Clarkson and Mackewn have carefully crafted and produced a powerfully informative book. Its pages are crammed with up-to-date facts and issues relating to Perls... The work is lean, not one word is wasted. Congratulations!' - The British Gestalt JournalFritz Perls was the co-founder of GestaltClarkson, Petruska is the author of 'Fritz Perls' with ISBN 9780803984523 and ISBN 0803984529.