A Spy Among Friends: Kim Philby and the Great Betrayal

Kim Philby was an upper-class English guy who went to the “right” prep school and college, then joined the intelligence service during WW2. He rose to become the head of counterintelligence at MI5, focused specifically on the Soviet Union. Then, in 1963, he defected to the Soviet Union — and it turns out he was working for them the entire time. Almost all intelligence operations during the 40s and 50s against the Soviet Union failed because of his tip-offs. A remarkable story. (View on Amazon)