There are 20 books in the Sebastian St. Cyr Mysteries series. The newest book is Who Will Remember which came out in 2025.

1
What Angels Fear

Book cover of What Angels Fear
'Harris' riveting debut delivers a powerful blend of political intrigue and suspense ...This fresh, fast-paced historical is sure to be a hit.' - Publishers WeeklyIt's 1811, and the threat of revolution haunts the upper classes of King George III's England. Then a beautiful young woman is found savagely murdered on

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2
When Gods Die

Book cover of When Gods Die
Brighton, England, 1811. The beautiful wife of an aging Marquis is found dead in the arms of the Prince Regent. Draped around her neck lies an ancient necklace with mythic origins-and mysterious ties to Sebastian St. Cyr, Viscount Devlin. Haunted by his past, Sebastian investigates both the Marchioness's death and


3
Why Mermaids Sing

Book cover of Why Mermaids Sing
In 1811 London, murder stalks the city's elite as the sons of prominent families are found in public places, with their bodies mutilated and strange objects stuffed in their mouths, and Sebastian St. Cyr takes time out from his shaky relationship with actress Kat Boleyn to track down the killer.

4
Where Serpents Sleep

Book cover of Where Serpents Sleep
The sole witness to the slaughter of eight young prostitutes at a house of refuge near Covent Garden, Hero Jarvis, daughter of the Prince Regent's cousin, Lord Jarvis, joins forces with Sebastian St. Cyr, Viscount Devlin, to investigate the massacre, following a trail of danger that takes them from London's


5
What Remains of Heaven

Book cover of What Remains of Heaven
Fifth in the critically acclaimed mystery series.

London 1812. When the controversial reform-minded Bishop of London is found bludgeoned to death in an ancient crypt beside the corpse of an unidentified man murdered decades before, Sebastian St. Cyr, Viscount Devlin, reluctantly agrees to investigate. As his search for the killer


6
Where Shadows Dance

Book cover of Where Shadows Dance
The “rich period detail [and] riveting action”* C.S. Harris delivers in her Sebastian St. Cyr mystery series reaches new heights as the aristocratic sleuth navigates dangerous political waters to bring a murderer to justice


 

Regency London: July 1812. How do you set about solving a murder no one can reveal


7
When Maidens Mourn

Book cover of When Maidens Mourn
When Gabrielle Tennyson is murdered, aristocratic investigator Sebastian St. Cyr and his new reluctant bride, the fiercely independent Hero Jarvis, find themselves involved in an intrigue concerning the myth of King Arthur, Camelot, and a future poet laureate...

8
What Darkness Brings

Book cover of What Darkness Brings
The death of a notorious London diamond merchant draws aristocratic investigator Sebastian St. Cyr and his new wife Hero into a sordid world of greed, desperation, and the occult, when the husband of Sebastian’s former lover Kat Boleyn is accused of the murder.

Regency England, September 1812: After a long


9
Why Kings Confess

Book cover of Why Kings Confess
The gruesome murder of a young French physician draws aristocratic investigator Sebastian St. Cyr and his pregnant wife, Hero, into a dangerous, decades-old mystery as a wrenching piece of Sebastian’s past puts him to the ultimate test.

Regency England, January 1813: When a badly injured Frenchwoman is found beside the


10
Who Buries The Dead

Book cover of Who Buries The Dead
The grisly murder of a West Indies slave owner and the reappearance of a dangerous enemy from Sebastian St. Cyr’s past combine to put C. S. Harris’s “troubled but compelling antihero” (Booklist) to the ultimate test in this taut, thrilling mystery.

London, 1813. The vicious decapitation of Stanley Preston, a


11
When Falcons Fall

Book cover of When Falcons Fall
The much-anticipated new entrĂ©e in the Sebastian St. Cyr “simply elegant”* historical mystery series, from the national bestselling author of Who Buries the Dead and Why Kings Confess.

Ayleswick-on-Teme, 1813. Sebastian St. Cyr, Viscount Devlin, has come to this seemingly peaceful Shropshire village to honor a slain friend and on


12
Where The Dead Lie

Book cover of Where The Dead Lie
“The entire series is simply elegant.”—Lisa Gardner, #1 New York Times bestselling author

In this historical mystery from the national bestselling author of Who Slays the Wicked, the abduction and murder of a young boy takes Sebastian St. Cyr from the gritty streets of London to the glittering pleasure haunts


13
Why Kill The Innocent

Book cover of Why Kill The Innocent
In this paperback reprint, a brutal murder draws nobleman Sebastian St. Cyr into the tangled web of the British royal court in this gripping historical mystery from the national bestselling author of Where the Dead Lie.

London, 1814. As a cruel winter holds the city in its icy grip, the


14
Who Slays The Wicked

Book cover of Who Slays The Wicked
The death of a fiendish nobleman strikes close to home as Sebastian St. Cyr is tasked with finding the killer to save his young cousin from persecution in this riveting new historical mystery from the USA Today bestselling author of Why Kill the Innocent....

When the handsome but dissolute young


15
Who Speaks For The Damned

Book cover of Who Speaks For The Damned
Sebastian St. Cyr investigates the mysterious life and death of a nobleman convicted of murder in this enthralling new historical mystery from the USA Today bestselling author of Why Kill the Innocent....

     It's June 1814, and the royal families of Austria, Russia, and the German states have gathered in London


16
What The Devil Knows

Book cover of What The Devil Knows
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


17
When Blood Lies

Book cover of When Blood Lies
Sebastian St. Cyr, Viscount Devlin, has spent years unraveling his family’s tragic history. But the secrets of his past will come to light in this gripping new historical mystery from the USA Today bestselling author of What the Devil Knows.

March, 1815. The Bourbon King Louis XVIII has been restored


18
Who Cries For The Lost

Book cover of Who Cries For The Lost
Sebastian St. Cyr must confront a savage killer and save his closest friend from the hangman’s noose in this heart-pounding new historical mystery from the USA Today bestselling author of When Blood Lies.

June 1815. The people of London wait, breathlessly, for news as Napoleon and the forces united against


19
What Cannot Be Said

Book cover of What Cannot Be Said
A seemingly idyllic summer picnic ends in a macabre murder that echoes a pair of slayings fourteen years earlier in this rivetingnew historical mystery from the USA Today bestselling author of Who Cries for the Lost.

July 1815: The Prince Regent's grandiose plans to celebrate Napoléon's recent defeat at Waterloo


20
Who Will Remember

Book cover of Who Will Remember
The macabre murder of a prominent nobleman throws an already unsettled London into chaos in this electrifying new historical mystery by the USA Today bestselling author of What Cannot Be Said.

August 1816. England is in the grip of what will become known as the Year Without a Summer. Facing