Salisbury, 1226. A mysterious poacher claims to be a long-lost heir - to a man found crushed by his own cart wheel. Ela Longespée is determined to find the truth, even though the king has coldly appointed another sheriff in her place. Ela takes pity on the man - an injured knight who once saved her husband’s life - and convinces the sheriff to release him from jail while she investigates. Will it turn out to be a deadly mistake?

The Monastery at Whitby is ruled over by the powerful and independent Abbess Hild. But when she needs someone to confide in, she turns to the honest warmth of her friend Fridgyth, the half-pagan herb-wife. A divisive and life-altering decision taken at the Great Synod is swiftly overshadowed as the monastery is ravaged by a deadly plague. As she tends the sick, Fridgyth starts to suspect that not all the deaths are natural. Despite Hild's stern warnings "not to meddle" she sets out to investigate.

London, September 1666. The Great Fire rages through the city, consuming everything in its path. Even the impregnable cathedral of St. Paul's is engulfed in flames and reduced to ruins. Among the crowds watching its destruction is James Marwood, son of a disgraced printer and reluctant government informer. In the aftermath of the fire, a semi-mummified body is discovered in the ashes of St. Paul's, in a tomb that should have been empty. The man's body has been mutilated, and his thumbs have been tied behind his back.

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.

In the fair autumn of Our Lord's grace 1431, the nuns of England's St. Frideswide's prepare for the simply ceremonies in which the saintly novice Thomasine will take her holy vows. But their quiet lives of beauty and prayer are thrown into chaos by the merciless arrival of Lady Ermentrude Fenner and her retinue of lusty men, sinful women, and baying hounds. The hard-drinking dowager even keeps a pet monkey for her amusement. She demands wine, a feast.... And her niece, the angelic Thomasine.

Oxford, Spring 1353. When young bookseller Nicholas Elyot discovers the body of student William Farringdon floating in the river Cherwell, it looks like a drowning. Soon, however, Nicholas finds evidence of murder. Who could have wanted to kill this promising student? As Nicholas and his scholar friend Jordain try to unravel what lies behind William's death, they learn that he was innocently caught up in a criminal plot.

Three young girls have been abducted from their homes. The body of one has been found in a shallow grave. The other two are still missing. The murder has shocked everyone in the peaceful city of Delft, and the mayor is desperate to catch the perpetrator before panic can spread any further. With the bitterly cold January weather intensifying, it is doubtful that the other two girls are still alive. But whoever took them is still at large.

harles II is well established at White Hall Palace, his mistress at hand in rooms over the Holbein bridge, the heads of some of the regicides on public display. London seethes with new energy, freed from the strictures of the protectorate, but many of its inhabitants have lost their livelihoods. One is Thomas Chaloner, a reluctant spy for the feared secretary of state, John Thurloe, and now returned from Holland in desperate need of employment. 

The much-feared and hated Eudo - the Lord Bishop of Winchester's clerk - is bludgeoned to death in Pershore Abbey and laid before the altar in the attitude of a penitent. Everyone who had contact with him had reason to dislike him, but who had reason to kill him? The Sheriff of Worcestershire's thief taker, wily Serjeant Catchpoll, and his new and unwanted superior, Undersheriff Hugh Bradecote, have to find the answer. And as the walls of the abbey close in on the suspects, the killer strikes again....

England. 1191. After the death of her friend and patron, King Henry II, Adelia Aguilar, England’s vaunted Mistress of the Art of Death, is living comfortably in retirement and training her daughter, Allie, to carry on her craft - sharing the practical knowledge of anatomy, forensics, and sleuthing that catches murderers.

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.

In December of 666 A.D., Fidelma of Cashel and her companion Brother Eadulf, having completed their business with the Archbishop of Canterbury, make one final journey before returning to Ireland. At the insistence of Brother Botulf, a childhood friend of Eadulf, they detour from their trip to Eadulf's home village and make their way to Aldred's Abbey. Arriving at midnight on the night of the old pagan festival of Yule, as requested, they find Botulf's dead body - his head caved in by a blunt instrument.

Ralph Delchard, a soldier who fought at the Battle of Hastings, and Gervase Bret, a talented lawyer, have been commissioned by William the Conqueror to look into irregularities brought to light during the compilation of the Domesday Book. A man’s body is found mutilated in Savernake Forest and the residents of Bedwyn sleep uneasy at night, fearing a monster stalking the town. When Ralph Delchard and Gervase Bret arrive, they discover that the locals are harbouring dark secrets and that the real killer may be a little closer to home....

England, 1176. Aelred Barling, esteemed clerk to the justices of King Henry II, is dispatched from the royal court with his young assistant, Hugo Stanton, to investigate a brutal murder in a village outside York. The case appears straightforward. A suspect is under lock and key in the local prison, and the angry villagers are demanding swift justice. But when more bodies are discovered, certainty turns to doubt - and amid the chaos it becomes clear that nobody is above suspicion.

It is 997 CE, the end of the Dark Ages. England is facing attacks from the Welsh in the west and the Vikings in the east. Those in power bend justice according to their will, regardless of ordinary people and often in conflict with the king. Without a clear rule of law, chaos reigns. In these turbulent times, three characters find their lives intertwined.