Kim Philby was the most notorious British defector and Soviet mole in history. A
gent, double agent, traitor and enigma, he betrayed every secret of Allied opera
tions to the Russians in the early years of the Cold War. Philby's two closest f
riends in the intelligence world, Nicholas Elliott of MI6 and James Jesus Anglet
on, the CIA intelligence chief, thought they knew Philby better than anyone, and
then discovered they had not known him at all.