Child 44 by Tom Rob Smith

In Stalin's Soviet Union, crime does not exist. But still millions live in fear. The mere suspicion of disloyalty to the State, the wrong word at the wrong time, can send an innocent person to his execution.
Officer Leo Demidov, an idealistic war hero, believes he's building a perfect society. But after witnessing the interrogation of an innocent man, his loyalty begins to waver, and when ordered to investigate his own wife, Raisa, Leo is forced to choose where his heart truly lies.
Then the impossible happens. A murderer is on the loose, killing at will, and every belief Leo has ever held is shattered. Denounced by his enemies and exiled from home, with only Raisa by his side, he must risk everything to find a criminal that the State won't admit even exists. On the run, Leo soon discovers the danger isn't from the killer he is trying to catch, but from the country he is trying to protect.

Amazon.com Review
If all that Tom Rob Smith had done was to re-create Stalinist Russia, with all its double-speak hypisy, he would have written a worthwhile novel. He did so much more than that in Child 44, a frightening, chilling, almost unbelievable horror story about the very worst that Stalin's henchmen could manage. In this worker's paradise, superior in every way to the decadent West, the citizen's needs are met: health care, food, shelter, security. All one must offer in exchange are work and loyalty to the State. Leo Demidov is a believer, a former war hero who loves his country and wants only to serve it well. He puts contradictions out of his mind and carries on. Until something happens that he cannot ignore. A serial killer of children is on the loose, and the State cannot admit it.
To admit that such a murderer is committing these crimes is itself a crime against the State. Instead of coming to terms with it, the State's official position is that it is merely coincidental that children have been found dead, perhaps from accidents near the railroad tracks, perhaps from a person deemed insane, or, worse still, homosexual. But why does each victim have his or her stomach excised, a string around the ankle, and a mouth full of dirt? Coincidence? Leo, in disgrace and exiled to a country village, doesn't think so. How can he prove it when he is being pursued like a common criminal himself? He and his wife, Raisa, set out to find the killer. The revelations that follow are jaw-dropping and the suspense doesn't let up. This is a debut novel worth reading. --Valerie Ryan

From Publishers Weekly
Starred Review. Set in the Soviet Union in 1953, this stellar debut from British author Smith offers appealing characters, a strong plot and authentic period detail. When war hero Leo Stepanovich Demidov, a rising star in the MGB, the State Security force, is assigned to look into the death of a child, Leo is annoyed, first because this takes him away from a more important case, but, more importantly, because the parents insist the child was murdered. In Stalinist Russia, there's no such thing as murder; the only criminals are those who are enemies of the state. After attempting to curb the violent excesses of his second-in-command, Leo is forced to investigate his own wife, the beautiful Raisa, who's suspected of being an Anglo-American sympathizer. Demoted and exiled from Moscow, Leo stumbles onto more evidence of the child killer. The evocation of the deadly cloud-cuckoo-land of Russia during Stalin's final days will remind many of Gorky Park and Darkness at Noon, but the novel remains Smith's alone, completely original and absolutely satisfying. Rights sold in more than 20 countries. (May)
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