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.

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....

Late summer, 1270. Although the Simon de Montfort rebellion is over, the smell of death still hangs over the land. In the small priory of Tyndal, the monks and nuns of the Order of Fontevraud long for a return to routine. Their hopes are dashed, however, when the young and inexperienced Eleanor of Wynethorpe is appointed their new prioress. Only a day after her arrival, a brutally murdered monk is found in the cloister gardens, and Brother Thomas, a young priest with a troubled past, arrives to bring her a more personal grief.

It is the autumn of 1278. The harvest is in. The air is crisp. Dusty summer breathes a last sigh before the dark seasons arrive. For Prioress Eleanor, dark times arrive early in Norfolk. The head of her order, Abbess Isabeau, has sent Father Etienne Davoir from their headquarters in France to inspect all aspects of Tyndal Priory, from its morals to its roofs. Surely the abbess would not have chosen her own brother for this rare and thorough investigation unless the cause was serious and she had reason to fear intervention from Rome.

LONDON, 1590. Queen Elizabeth I's control over her kingdom is wavering. Amidst a tumultuous backdrop of Spanish plotters, Catholic heretics and foreign wars threatening the country's fragile stability, the body of a small boy is found in the City of London, with strange marks that no one can explain. When idealistic physician Nicholas Shelby finds another body displaying the same marks only days later, he becomes convinced that a killer is at work, preying on the weak and destitute of London.  

Magdalene la Batarde is the madam of the Old Priory Guesthouse in Southwark. She and her women are expected to engage in a number of sinful activities, but bloody murder isn't one of them until Baldassare, the messenger, dies. Though Baldassare isn't a regular client of the Old Priory Guesthouse, Magdalene and her women refuse to allow his death to go unavenged. Of course, their efforts aren't completely altruistic.

Salisbury, 1226. A young pregnant woman is found tangled in reeds in the river Avon, her identity a mystery. Grieving widow Ela Longespée is determined to succeed her husband as sheriff of Salisbury, and quickly takes charge of the investigation. She soon finds herself in the thick of a neighborhood scandal and a struggle to maintain her authority. With multiple suspects, can she identify the true killer? 

It is 1537, a time of revolution that sees the greatest changes in England since 1066. Henry VIII has proclaimed himself Supreme Head of the Church. The country is waking up to savage new laws, rigged trials and the greatest network of informers ever seen. And under the orders of Thomas Cromwell, a team of commissioners is sent throughout the country to investigate the monasteries.

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.

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....

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. 

Oxford, 1583. Giordano Bruno, a radical thinker fleeing the Inquisition, is sent undercover to Oxford to expose a Catholic conspiracy against Queen Elizabeth. But he has his own secret mission at the University, which must remain hidden at all costs. When a series of hideous murders are committed, Bruno is compelled to investigate. What he finds makes it brutally clear that the Tudor throne itself is at stake....

Magic is forbidden throughout the Four Realms. For decades, sorcerers and those associating with them were hunted to near extinction.But Seri, a Leiran noblewoman living in exile, is no stranger to defying the unjust laws of her land. She is sheltering a wanted fugitive who possesses unusual abilities-a fugitive with the fate of the realms in his hands...

Thomas's friend Ben Mallam, the streetwise jingler (a dealer in used horses) returns to aid him. After a run of bad luck, perhaps Ben's fortunes will change as he helps Thomas unravel a deadly plot which strikes at the very heart of Tudor England, threatening the security of the nation itself.

Once accused of witchcraft, Martha Spicer is now free from the shadow of the gallows and lives a safe and happy life with her husband, Jacob. But when Jacob heads north to accompany his master, he warns Martha to keep her healing gifts a secret, to keep herself safe, to be a good wife. Martha loves Jacob, but without him there to protect her, she soon comes under the suspicious eye of the wicked Steward Boult, who’s heard of her talent and forces her to attend to him. If she refuses, he promises to destroy the good life she has built for herself with Jacob.