London, 1846. Ramshackle and crumbling, St Saviour's Infirmary awaits demolition. Within its stinking wards and cramped corridors the doctors bicker and fight. Ambition, jealousy and hatred seethe beneath the veneer of professional courtesy. Always an outsider, and with a secret of her own to hide, apothecary Jem Flockhart observes everything, but says nothing. And then six tiny coffins are uncovered, inside each a handful of dried flowers and a bundle of moldy rags.

When the body of a young man is found stuffed into the tomb of a medieval knight, Parish Constable Daniel Haze is tasked with investigating his first solo murder case. Suspicion instantly falls on the only stranger to arrive in the village of Birch Hill just before the crime took place, but the American captain proves to be an unexpected asset. A former soldier and a skilled surgeon, Jason Redmond is not only willing to assist Haze with the investigation but will risk his own safety to apprehend the killer.

The Earl of Wrexford possesses a brilliant scientific mind, but boredom and pride lead him to reckless behavior. He does not suffer fools gladly. So when pompous, pious Reverend Josiah Holworthy publicly condemns him for debauchery, Wrexford unsheathes his rapier-sharp wit and strikes back. As their war of words escalates, London's most popular satirical cartoonist, A. J. Quill, skewers them both.

When young Tyballis discovers her husband has been arrested for murder, she is delighted. As a young orphan coerced to marry her abusive neighbor, she was horribly used. Now is her chance to be rid of him for good and find the confidence she never had. When Tyballis joins forces with the motley network of Andrew’s informers and thieves, they are lured into the dark and dangerous world of medieval London’s political intrigue and back alley slums.

Hugh of Singleton, fourth son of a minor knight, has been educated as a clerk, usually a prelude to taking holy orders. However, feeling no certain calling despite a lively faith, he turns to the profession of surgeon, training in Paris and then hanging out his sign in Oxford. A local lord asks him to track the killer of a young woman whose bones have been found in the castle cesspit. She is identified as the impetuous missing daughter of a local blacksmith, and her young man, whom she had provoked very publicly, is in due course arrested and sentenced at the Oxford assizes.

A murdered opera singer. A duke drenched in her blood. For Bow Street Officer Hugh Marsden, the brutal killing is a straightforward case. Ever since his exile from polite society, the chance to arrest a high and mighty peer of the realm has never presented itself. Hugh won't snub the opportunity now. But Audrey Sinclair, the Duchess of Fournier, is certain her husband is wrongly accused, and she's determined to prove it to the arrogant Bow Street officer, even if she must employ her most peculiar ability—or perhaps curse—to guide her investigation. After all, a duchess can do as she pleases.

AD 1045. Godwin of Wessex, one of the most powerful earls in the country, prepares for the marriage of his daughter to King Edward of England. The mood is jubilant, his family's relationship with the Crown secured through matrimony. But one man seeks to undermine him at every opportunity.

Two years ago, a hostile Prime Minister launched the Monochrome inquiry, investigating "historical over-reaching" by the British Secret Service “to investigate historical over-reaching.” Monochrome’s mission was to ferret out any hint of misconduct by any MI5 officer—and allowed Griselda Fleet and Malcolm Kyle, the two civil servants seconded to the project, unfettered access to any and all confidential information in the Service archives in order to do so. But MI5’s formidable First Desk did not become Britain’s top spy by accident, and she has successfully thwarted the inquiry at every turn.

The Romans invaded Britannia in AD 43 confident of victory. They swept through a divided and ill-equipped enemy, scattered across tough terrain. But one man was not prepared to surrender. Caratacus - quick-witted youngest son of a a tribal king - had been trained from birth to be a warrior of power and grit. Sent to be schooled by the Druids in his boyhood, his training meant that an already strong and cunning prince returned to his father's kingdom as a war machine.

1660 England. General Edward Whalley and his son-in law Colonel William Goffe board a ship bound for the New World. They are on the run, wanted for the murder of King Charles I—a brazen execution that marked the culmination of the English Civil War, in which parliamentarians successfully battled royalists for control.

Anno Domini 1040. Christianity has swept unstoppably across Scandinavia, leaving few enclaves of the old ways clinging on to their fading world as King Olof of Sweden works to convert his people. A young warrior, Halfdan, has witnessed the ‘mercy' of the Christian lords, watched his people attacked, his village burned and the Odin stone toppled as heretical. Watched his father cut down by an ambitious Christian jarl and his zealous priest. Among the ashes of his world, he vowed an oath of vengeance before all the gods.

Cornwall, 1730: A young girl known only as Red travels with her father making a living predicting fortunes using the ancient Cornish method of the Square of Sevens. Shortly before he dies, her father entrusts Red’s care to a gentleman scholar, along with a document containing the secret of the Square of Sevens technique.

25 BC. Titus Cervianus is no ordinary soldier. A former surgeon from the city of Ancyra, he's now a capsarius—a combat medic. Cervianus is a pragmatist, a scientist and truly unpopular with his legion. The Twenty Second Deiotariana have been sent to deal with uprisings and chaos in Egypt. Yet the Twenty Second is no ordinary legion either. Founded as the private royal army of one of Rome's most devoted allies, the king of Galatia, their ways are not the same as the other legions, a factor that sets them apart and causes friction with their fellow soldiers.

In these tales, Lord John vows to avenge a murder, investigates a terrifying "night-hag" on the battlefields of Europe, and discovers treason in His Majesty's ranks.

Newly returned from finishing school, Lady Juliette Thorndike is ready to debut in London society. Due to her years away, she hasn't spent much time with her parents, and sees them only as the flighty, dilettante couple the other nobles love. But when they disappear, she discovers she never really knew them at all. They've been living double lives as government spies-and they're only the latest in a long history of espionage that is the family's legacy.