Europe is still littered with the darkest secrets of the Cold War. And the most deadly revelation of them all is about to be made…

Hard-up Russia expert Dr Sam Gaddis finally has a lead for the book that could solve all his career problems. But the story of a lifetime becomes an obsession that could kill him.

When his source is found dead, Gaddis is alone on the trail of the Cold War’s deadliest secret: the undiscovered sixth member of the infamous Cambridge spy ring.

Suddenly threatened at every step and caught between two beautiful women, both with access to crucial evidence, Sam cannot trust anyone.

To get his life back, he must chase shadows through Europe’s corridors of power. But the bigger the lie, the more ruthlessly the truth is kept buried…

The Times‘In the first rank of the new generation of espionage writers’

William Boyd, bestselling author ofRestless‘An utterly absorbing and compelling novel. A brilliant re-imagining of events surrounding the notorious Cambridge spy-ring’

Sunday Times‘Classy … an assured and richly enjoyable thriller’

Daily Mail‘Delicate and supremely controlled, this is a spy story to be savoured, not rushed’

Guardian‘None of the new generation of spy writers lives up to the standard set by Deighton, Forsyth and Le Carré. Enter Cumming, a long-awaited light at the end of a very long tunnel … As good as Le Carré – praise indeed’

Praise forThe Trinity Six