The barrel should have contained books - instead it held treasure and a severed head...Gil Cunningham and his old acquaintance, Glasgow merchant Augie Morison, expecting a delivery of books from the Low Countries, report the gruesome substitute to the Provost, and at the inquest the next morning Morison is accused of the murder and imprisoned. He appeals to Gil, who sets out with his friend and future father in law Maistre Pierre, the French master-mason

When the peat-cutters came to report the dead man, Gil Cunningham was up in the roof-space of his mother's house, teaching his new young wife swordplay. They believe the corpse to be that of a local missing man. His wife and the widow who runs the local coalmine are sure the body belongs to someone else, but then they find themselves accused of having killed him by witchcraft. And if the corpse is not the missing man, who is it? Gil and Alys try to get to the heart of the matter.

“And you are telling me,” said Gil Cunningham, “that David Drummond vanished away forty years ago and is now returned, seemingly not a day older?” “That’s about the sum of it,” agreed Sir William Stewart. In Sir William’s remote part of Scotland it seems almost possible that a young boy could have been stolen away by the fairies and returned forty years later, no older – and if he isn’t Davie Drummond, who is he? And then he suffers a succession of near-fatal ‘accidents’.

Although he was watching closely when the mummer was poisoned, it took Gil Cunningham several days and three more poisonings to work out how it was done. Danny Gibson and Nanty Bothwell, rivals for the affections of Agnes Renfrew, the apothecary's pretty daughter, are also good friends.

Gil Cunningham had hoped that the first time he set foot in the brothel on the Drygate it would also be his last, but by the time all was settled he felt quite at home within its artfully painted chambers. The bawdy house, along with the neighbouring property and two more in Strathblane, are all part of a deal offered to Gil and his wife Alys by the forceful Dame Isabella.

Tied to St Mungo's Cross by the cathedral to be cured of her madness overnight by the saint, the young woman is found in the morning beaten and strangled, still tied to the cross. But is she who she seems to be? And who would flout the saint's protection like this? Gil Cunningham must trace the dead woman and find her enemies, track down the thieves and murderers and identify the watchers in the shadows, particularly the elusive fourth person who holds the secret of what happened that night. Questioning cathedral staff and apprentice boys, pilgrims and tradesmen, he uncovers only more puzzles.

At the May Day dancing at Glasgow Cross, Gil Cunningham sees not only the woman who is going to be murdered, but her murderer as well. Gil is a recently qualified lawyer whose family still expect him to enter the priesthood. When he finds the body of a young woman in the new building at Glasgow Cathedral he is asked to investigate, and identifies the corpse as the runaway wife of cruel, unpleasant nobleman John Semphill. With the help of Maistre Pierre, the French master-mason, Gil must ask questions and seek a murderer in the heart of the city.

In a peaceful retirement village, four unlikely friends meet weekly in the Jigsaw Room to discuss unsolved crimes; together, they call themselves the Thursday Murder Club. When a local developer is found dead with a mysterious photograph left next to the body, the Thursday Murder Club suddenly find themselves in the middle of their first live case.

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?

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.

Lady Emily Hardcastle is an eccentric widow with a secret past. Florence Armstrong, her maid and confidante, is an expert in martial arts. The year is 1908 and they've just moved from London to the country, hoping for a quiet life. But it is not long before Lady Hardcastle is forced out of her self-imposed retirement. There's a dead body in the woods, and the police are on the wrong scent. Lady Hardcastle makes some enquiries of her own, and it seems she knows a surprising amount about crime investigation...

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....

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.

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.

It's 1194, and Sir Faucon de Ramis, the shire's newly appointed keeper of the pleas, must do his duty and make an official declaration of the cause of a miller's death. Saddled with a clerk who names Faucon his "penance", the shire's first crowner must thread the tangled relationships between the sheriff, the village of Priors Holston, and the priory that once ruled it. As a simple task takes a turn to the political, what seems obvious isn't, and what appears safe turns out to be more dangerous than he could imagine.