Tackles the greatest spy story of all: the rise and fall of Kim Philby, MI6's Cambridge-bred golden boy who used his perch high in the intelligence world to betray friend and country to the Soviet Union for over two decades. In Macintyre's telling, Philby's story is not a tale of one spy, but of three: the story of his complex friendships with fellow Englishman operative Nicholas Elliott and with the American James Jesus Angleton, who became one of the most powerful men in the CIA. These men came up together, shared the same background, went to the same schools and clubs, and served the same cause—or so Elliott and Angleton thought. In reality, Philby was channeling all of their confidences directly to his Soviet handlers, sinking almost every great Anglo-American spy operation for twenty years. Even as the web of suspicion closed around him, and Philby was driven to greater lies and obfuscations to protect his secret, Angleton and Elliott never abandoned him. When Philby's true master was finally revealed with his defection to Moscow in 1963, it would have profound and devastating consequences on these men who thought they knew him best, and the intelligence services they helped to build.