Hides some of Stalin's darkest secrets... Shortlisted for the CWA Ellis Peters Historical Dagger for Best Historical Crime Novel of the Year Shortlisted for the Ireland AM Crime Fiction Book of the Year Moscow, 1937. Captain Korolev, a police investigator, is enjoying a long-overdue visit from his young son Yuri when an eminent scientist is shot dead within sight of the Kremlin and Korolev is ordered to find the killer. It soon emerges that the victim, a man who it appears would stop at nothing to fulfil his ambitions, was engaged in research of great interest to those at the very top ranks of Soviet power. When another scientist is brutally murdered, and evidence of the professors' dark experiments is hastily removed, Korolev begins to realise that, along with having a difficult case to solve, he's caught in a dangerous battle between two warring factions of the NKVD. And then his son Yuri goes missing... A desperate race against time, set against a city gripped by Stalin's Great Terror and teeming with spies, street children and Thieves, The Twelfth Department confirms William Ryan as one of the most compelling historical crime novelists at work today.

Moscow, 1936, and Stalin's Great Terror is just beginning. In a church, a woman is found dead, her body on display. Captain Alexei Korolev of the Criminal Investigation Division of the Moscow Militia is assigned, but the NKVD is watching and exile is a real possibility. Committed to the case, Korolev enters the realm of the Thieves, rulers of Moscow's underworld. But as more bodies are found, Korolev begins to question whom he can trust and who are the real criminals. With Alexei Korolev, William Ryan has given us one of the most compelling detectives in modern literature, a man who will lead us through a fear-choked Russia to find the only thing that can save him — the truth.

Following his investigations in The Holy Thief, which implicated those at the very top of authority in Soviet Russia, Captain Alexei Korolev finds himself decorated and hailed as an example to all Soviet workers. But Korolev lives in an uneasy peace his new-found knowledge is dangerous, and if it is discovered what his real actions were during the case, he will face deportation to the frozen camps of the far north. But when the knock on the door comes, in the dead of night, it is not Siberia Korolev is destined for. Instead, Colonel Rodinov of the NKVD security service asks the detective to look into the suspected suicide of a young woman: Maria Alexandovna Lenskaya, a model citizen. Korolev is unnerved to learn that Lenskaya had been of interest to Ezhov, the feared Commissar for State Security. Ezhov himself wants to matter looked into. And when the detective arrives on the set for Bloody Meadow, in the bleak, battle-scarred Ukraine, he soon discovers that there is more to Lenskaya's death than meets the eye.