Just before dawn one late-summer morning, Captain Bruno Courrèges is roused from sleep by the wail of the town siren atop the Mairie, summoning the volunteer firemen of St Denis. Bruno, the only policeman in the small Périgord town, follows the fire engines towards the site of a large barn, now engulfed in flames, the surrounding fields ablaze. Everything points to arson. A Californian wine maker is planning to buy up half the valley to create a huge wine-producing operation.

Following the funeral of a local farmer, Bruno gets a phone call from his son. He tells Bruno that before his father's sudden death, he had signed over his property to an insurance company in return for a subscription to a luxury retirement home. Bruno discovers that both the retirement home and the insurance company are scams with links to a Russian oligarch whose dealings are already being tracked by the French police. 

Bruno, Chief of Police in the charming French town of St Denis, is already busy with a case when the body of an undercover French Muslim cop is found in the woods, a man who called Bruno for help only hours earlier. But Bruno's sometime boss and rival, the Brigadier, doesn't see this investigation as a priority - there are bigger issues at stake. Bruno has other ideas. Meanwhile, a Muslim youth named Sami turns up at a French army base in Afghanistan hoping to get home to St Denis. One of Bruno's old army comrades helps to smuggle Sami back to France, but the FBI aren't far behind. 

Life in south-west rural France is not the sleepy idyll you might suppose. Local duck and goose farms are being attacked by animal rights protestors attempting to halt the production of foie gras. A senior policeman has been shot by terrorists believed to be the Basque Separatists of ETA. And if that weren’t enough, a group of students have just unearthed a ‘modern’ skeleton during a dig at one of the ancient sites of this famous region and home to prehistoric man - a dig that has brought an influx of foreigners to the Dordogne.

France’s Périgord region is the home of the black truffle and at five thousand euros a kilo, the exquisite ‘Black Diamond’ is a treasured local asset. When reports come in that this unique delicacy is being adulterated with a cheaper Chinese version, Captain Bruno Courrèges is asked to investigate the scam. But matters take a much darker turn when a horrific murder occurs, and Bruno has his work cut out to find the connection between present crimes and long-buried ones that are linked to France’s colonial past.

St Denis may be picturesque and sleepy, but it has more than its fair share of murder and mystery, as Bruno knows all too well. When Bruno is invited to the 90th birthday of a powerful local patriarch - a war hero with high-level political connections in France, Russia and Israel - he encounters a family with more secrets than even he had imagined. 

It is springtime France's Périgord, a time of beauty and calm. But not for Bruno, chief of police of the small town of St Denis. A woman's body has been found on a boat, bearing signs of a black magic ritual. Bruno has too much on his plate as it is - mediating a domestic abuse case that needs careful handling and a dodgy local development proposal that seems just too good to be true.

Best-selling author Martin Walker’s previous two novels starring Chief of Police Bruno Courrèges became hits with fans and critics around the globe. In this thrilling third mystery, Bruno has his hands full with trouble in the truffle trade in St. Denis’ marketplace. And when a friend is murdered, things really start heating up.

Bruno, now Chief of Police for the whole Vézère valley, has an unusual challenge to rise to: teaching at his friend Pamela's new cookery school. It is a daunting prospect - the disappearance of one of the school's pupils almost serves as a welcome distraction. When the woman's body is discovered in one half of a double homicide, the evidence points to something far out of the ordinary. The other murder victim is a man, covered in combat scars and with a false passport. Investigations reveal a list of enemies as long as Bruno's arm. 

The victim carries no identification and her fingerprints are not known to the French Police or Interpol.The only clue to the woman's identity is that her dentistry looks American, but Bruno's inquiries at local hotels and gites yield no trace of a missing foreign woman. The chateau of Commarque, begun in the 11th century, was founded by a Bishop of Sarlat and entrusted to the Knights Templar. In the rocks beneath it are caves.