Spy among friends: Philby and the great betrayal. Ben Macintyre. 2015.

Kim Philby is perhaps the most notorious British defector in history. Agent, double agent, charmer and traitor, betrayed every secret of Allied operations to the Russians in the early years of the Cold War. In the aftermath of the Second World War, Philby, Nicholas Elliott and James Jesus Angleton were rising stars in the intelligence world and shared every secret. Elliott and Angleton thought they knew Philby better than anyone - and then discovered they had not known him at all.

This is a story of loyalty, trust and treachery, class and conscience, of male friendships forged and then systematically betrayed……….