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Publisher Description

Sebastian St. Cyr thought a notorious killer had been brought to justice until a shocking series of gruesome new murders stuns the city in this thrilling historical mystery from the USA Today bestselling author of Who Speaks for the Damned.

It's October 1814. The war with France is finally over and Europe's diplomats are convening in Vienna for a conference that will put their world back together. With peace finally at hand, London suddenly finds itself in the grip of a series of heinous murders eerily similar to the Ratcliffe Highway murders of three years before. 

In 1811, two entire families were viciously murdered in their homes. A suspect--a young seaman named John Williams--was arrested. But before he could be brought to trial, Williams hanged himself in his cell. The murders ceased, and London slowly began to breathe easier. But when the lead investigator, Sir Edwin Pym, is killed in the same brutal way three years later and others possibly connected to the original case meet violent ends, the city is paralyzed with terror once more. 

Was the wrong man arrested for the murders? Bow Street magistrate Sir Henry Lovejoy turns to his friend Sebastian St. Cyr, Viscount Devlin, for assistance. Pym's colleagues are convinced his manner of death is a coincidence, but Sebastian has his doubts. The more he looks into the three-year-old murders, the more certain he becomes that the hapless John Williams was not the real killer. Which begs the question--who was and why are they dead set on killing again?

Mysteries & Thrillers
April 6
Penguin Publishing Group
Penguin Random House Canada

Customer Reviews

NPutra ,

Hell of a good book

What a read! An excellent mystery with superb atmosphere. Felt as if I was in old England. Very good. Going to look up the author’s other books.

nmgski ,

Compelling Mix of Fiction and History

I received an ARC of this book to read through NetGalley. All opinions are my own. What the Devil Knows by C.S. Harris is the sixteenth book in her most excellent Sebastian St. Cyr Mystery series. While it could be read as a stand-alone, I highly recommend the previous books in the series. The books are extremely well written, their mix of history and fiction is engrossing and they are some of the few books that hold my focus as we move into year two of this pandemic. The audio-book versions are also extremely well done. Sir Henry Lovejoy once again asks for Sebastian’s assistance in a case that has Scotland Yard puzzled, recent murders appear to be linked to a series of murders from three years previously, the Ratcliffe Highway Murders in which two families were slaughtered in a brutal fashion, and the man suspected of committing the murders committed suicide while in custody. The authors attention to detail makes for an engrossing read and I started this book after dinner and did not go to bed until I’d finished because it so captured my attention. I highly recommend this book and series, the twists and turns of the plot won’t let you down and the characters will become old friends, each new encounter just a joy to read. Publishing Date: April 6, 2021. #WhatTheDevilKnows #CSHarris #BerkleyPublishingGroup #NetGalley #HistoricalMystery #SebastianStCyrMysterySeries #MysterySeries #bookstagram #bookstagrammer

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