Kim Philby’s job is to uncover other people’s secrets. But now, his oldest friend is on the verge of exposing his own. As two other Cambridge spies are unmasked, Philby’s reputation comes under fierce scrutiny. And Nicholas Elliott is determined to find out whether his old confidante is also a KBG agent. Can Philby wriggle free of Elliott’s sting operation and a government desperate to catch traitors?

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