It's the height of summer, and the wealthy Finney family have gathered at the Manoir Bellechasse to pay tribute to their late father. But as the temperature rises, old secrets and bitter rivalries begin to surface. When the heat wave boils over into a mighty storm, a dead body is left in its wake. Chief Inspector Gamache, a guest at the Bellechasse, finds himself with a building full of suspects. With the hotel locked down, the murderer is trapped. But a cornered predator is always the most dangerous of all...

Winter in Three Pines, and the sleepy village is carpeted in snow. It's a time of peace and goodwill - until a scream pierces the biting air. A spectator at the annual Boxing Day curling match has been fatally electrocuted. Despite the large crowd, there are no witnesses and - apparently - no clues. Chief Inspector Armand Gamache discovers a history of secrets and enemies in the dead woman's past.

When Chief Inspector Gamache arrives in picturesque Three Pines, he steps into a village in chaos. A man has been found bludgeoned to death, and there is no sign of a weapon, a motive or even the dead man's name. As Gamache and his colleagues start to dig under the skin of this peaceful haven for clues, they uncover a trail of stolen treasure, mysterious codes and a shameful history that begins to shed light on the victim's identity - and points to a terrifying killer...

As Quebec City shivers in the grip of winter, its ancient stone walls cracking in the cold, Chief Inspector Armand Gamache plunges into the strangest case of his celebrated career. A man has been brutally murdered in one of the city’s oldest buildings - a library where the English citizens of Quebec safeguard their history. And the death opens a door into the past, exposing a mystery that has lain dormant for centuries... a mystery Gamache must solve if he’s to catch a present-day killer.

“Hearts are broken,” Lillian Dyson carefully underlined in a book. “Sweet relationships are dead.” But now Lillian herself is dead. Found among the bleeding hearts and lilacs of Clara Morrow's garden in Three Pines, shattering the celebrations of Clara's solo show at the famed Musée in Montreal.

No outsiders are ever admitted to the monastery of Saint-Gilbert-Entre-les-Loups, hidden deep in the wilderness of Quebec, where two dozen cloistered monks live in peace and prayer. They grow vegetables, they tend chickens, they make chocolate. And they sing. Ironically, for a community that has taken a vow of silence, the monks have become world-famous for their glorious voices, raised in ancient chants whose effect on both singer and listener is so profound it is known as “the beautiful mystery.”

Shadows are falling on the usually festive Christmas season for Chief Inspector Armand Gamache. When Gamache receives a message from Myrna Landers that a longtime friend has failed to arrive for Christmas in the village of Three Pines, he welcomes the chance to get away from the city. Gamache soon discovers the missing woman was once one of the most famous people not just in North America, but in the world, and now goes unrecognized by virtually everyone. As events come to a head, Gamache is drawn ever deeper into the world of Three Pines.

Hardly a day goes by when nine-year-old Laurent Lepage doesn't cry wolf. From alien invasions to walking trees to winged beasts in the woods to dinosaurs spotted in the village of Three Pines, his tales are so extraordinary no one can possibly believe him. Including Armand and Reine-Marie Gamache, who now live in the little Quebec village.

When an intricate old map is found stuffed into the walls of the bistro in Three Pines, it at first seems no more than a curiosity. But the closer the villagers look, the stranger it becomes. Given to Armand Gamache as a gift the first day of his new job, the map eventually leads him to shattering secrets. To an old friend and older adversary. It leads the former Chief of Homicide for the Sûreté du Québec to places even he is afraid to go. But must. And there he finds four young cadets in the Sûreté academy, and a dead professor. And, with the body, a copy of the old, odd map.

When a mysterious figure appears in Three Pines one cold November day, Armand Gamache and the rest of the villagers are at first curious. Then wary. Through rain and sleet, the figure stands unmoving, staring ahead. From the moment its shadow falls over the village, Gamache, now Chief Superintendent of the Sûreté du Québec, suspects the creature has deep roots and a dark purpose. Yet he does nothing. What can he do? Only watch and wait. And hope his mounting fears are not realized.

Former Chief Inspector of Homicide, Armand Gamache, has found a peace he'd never imagined possible, away from the front line of the police and in the tranquil village of Three Pines. But when his friend Clara Morrow asks for help, he can't bring himself to refuse her, despite the old wounds it threatens to re-open. Clara's husband, Peter, is missing, having failed to come home on the first anniversary of their separation, as promised.

When a peculiar letter arrives inviting Armand Gamache to an abandoned farmhouse, the former head of the Sûreté du Québec discovers that a complete stranger has named him one of the executors of her will. Still on suspension, and frankly curious, Gamache accepts and soon learns that the other two executors are Myrna Landers, the bookseller from Three Pines, and a young builder. None of them had ever met the elderly woman. The will is so odd and includes bequests that are so wildly unlikely that Gamache and the others suspect the woman must have been delusional. 

It’s Gamache’s first day back as head of the homicide department, a job he temporarily shares with his previous second-in-command, Jean-Guy Beauvoir. Flood waters are rising across the province. In the middle of the turmoil a father approaches Gamache, pleading for help in finding his daughter. As crisis piles upon crisis, Gamache tries to hold off the encroaching chaos, and realizes the search for Vivienne Godin should be abandoned. But with a daughter of his own, he finds himself developing a profound, and perhaps unwise, empathy for her distraught father.

On their first night in Paris, the Gamaches gather as a family for a bistro dinner with Armand’s godfather, the billionaire Stephen Horowitz. But an attempt on the elderly man’s life sends Armand, his wife, Reine-Marie, and his former second-in-command at the Sûreté, Jean-Guy Beauvoir, from the top of the Tour d’Eiffel, to the bowels of the Paris Archives, from luxury hotels to odd, coded works of art. It sends them deep into the secrets Armand’s godfather has kept for decades.

While the residents of the Québec village of Three Pines take advantage of the deep snow to ski and toboggan, to drink hot chocolate in the bistro and share meals together, the chief inspector finds his holiday with his family interrupted by a simple request. He’s asked to provide security for what promises to be a non-event. A visiting professor of statistics will be giving a lecture at the nearby university. While he is perplexed as to why the head of homicide for the Sûreté du Québec would be assigned this task, it sounds easy enough.