Tuesday, April 6, 2021

What the Devil Knows

It’s a pleasure to tell you about the latest book by author C.S. Harris, WHAT THE DEVIL KNOWS, the 16th installment in the Sebastian St. Cyr Mystery series.

Publisher: Berkley (April 6, 2021)

Language: English
Hardcover: 336 pages
ISBN-10: 0593102665
ISBN-13: 978-0593102664

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?

Meet the Author

Photo by Samantha Brown

C. S. Harris
, aka Candice Proctor, is the USA TODAY bestselling author of the Sebastian St. Cyr mystery series, the C. S. Graham contemporary thriller series, seven historical romances, and the standalone Civil War historical GOOD TIME COMING.

An Air Force brat who grew up exploring castles in Spain and fishing in the mountains of Oregon and Idaho, Candy later worked as an archaeologist and earned a PhD in European history.

A former academic who has lived all over the world, she now makes her home in New Orleans with her husband, former intelligence officer Steven Harris. Visit her website at www.csharris.net

Thanks for stopping by today. Isn’t there something intriguing about a series that has this many installments in it? Doesn’t the cover just scream mystery?


  1. I do love historical mysteries. Thank you. And yes, that cover is excellent.

  2. Like Elephant's Child, I enjoy historical mysteries, Mason, so this one looks interesting. The setting's appealing to me, too. Thanks for sharing.

  3. This sounds like a fantastic book! Lots of suspense.

  4. Hi Mason and Candy - this sounds a great escape book - and one that will hook me in to others of hers. It appeals because of its setting and time frame ... thanks for the introduction to her St Cyr mysteries ... cheers Hilary


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