I liked this book . I have read Ben MacTyre's ''The Spy and The Traitor'' which was another well researched and written book . I have read previously about Philby and was aware of the basic background to his life . However, this book puts ''meat on the bones'' . The book goes into details and material which was not included in other works on Philby . Philby was a complex character and this comes out in the book . My overall impression of Philby is that he was a total bastard and one of the worst traitors England has ever had .