FT columnist and author Simon Kuper joins us to talk about his critically acclaimed book, a fascinating biography of the part-Jewish British KGB double agent George Blake.

George Blake was the last remaining Cold War spy. As a Senior Officer in the British Intelligence Service who was double agent for the Soviet Union, his actions had devastating consequences for Britain. Yet he was also one of the least known double agents, and remained unrepentant.

Through a combination of personal interviews, research and unique access to Stasi records, journalist Simon Kuper unravels who Blake truly was, what he was capable of, and why he did it.