Tom Rob Smith is the author of the acclaimed Child 44 trilogy. Child 44 itself was a global publishing sensation, selling over two million copies. It was longlisted for the Man Booker Prize, shortlisted for the Costa First Novel Prize and won the CWA Steel Dagger Award. His most recent novel, The Farm, was a Number One international bestseller. Tom also writes for television and won a Writer's Guild Award for best adapted series and an Emmy and Golden Globe for best limited series with American Crime Story: The Assassination of Gianni Versace.

Three decades. Two murders. One conspiracy. Who is Agent 6? The blistering new novel from the multimilliom-copy bestselling author of Child 44.

Moscow, 1965. Former Secret Service agent Leo Demidov is forbidden to travel with his wife and daughters to New York as part of a 'Peace Tour', meant to foster better relations between the two Cold War enemies. Leo's natural paranoia reaches its peak: Why have his family been selected? What is being planned?

When Leo's worst fears are realised and a tragic murder destroys everything he loves, he demands only one thing: that he is allowed to investigate and find the killer who has struck at the heart of his family. Crippled by grief, his request denied, Leo sees no other option than to take matters into his own hands, thousands of miles from the crime scene.

In a surprising, thrilling story that spans decades and continents - from the backstreets of 1960s New York to the mountains of Afghanistan in the 1980s - Leo will stop at nothing as he hunts the one person who knows the truth: Agent 6.