A prolific journalist, Martin Walker has crafted a mystery series that deftly blends the stylings of Peter Mayle and Alexander McCall Smith. Chief Bruno Courreges loves life in his small French village. One day his idyll is disturbed when a local research station for genetically modified crops is burned down. An enclave of environmentalists seems to be the most likely culprit, but soon Bruno uncovers evidence that makes the case infinitely more complicated.

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.

After the assassination of his wife and son, Gabriel Allon retires from his brutal anti-terrorist career and loses himself in his previous cover job: art restoration. But when Tariq al-Hourani, the Palestinian terrorist responsible for his family’s death, begins a killing spree designed to destroy Middle East peace talks, Gabriel once again slips into the shadowy world of international intrigue. In a global game of hide-and-seek, the motives of Gabriel and Tariq soon become more personal than political.

Two years ago, a hostile Prime Minister launched the Monochrome inquiry, investigating "historical over-reaching" by the British Secret Service “to investigate historical over-reaching.” Monochrome’s mission was to ferret out any hint of misconduct by any MI5 officer—and allowed Griselda Fleet and Malcolm Kyle, the two civil servants seconded to the project, unfettered access to any and all confidential information in the Service archives in order to do so. But MI5’s formidable First Desk did not become Britain’s top spy by accident, and she has successfully thwarted the inquiry at every turn.

Walker's richly interwoven novel opens with the arrival of a mysterious package for a young American woman working in a London auction house. Brought by a British officer, it contains a 17,000-year-old fragment of a cave painting left to him by his father, a former World War II hero. The fragment, significant and stunning in itself, is also the key to the existence of an unknown cave that may be more important in the history of art and human creation than the world-famous one at Lascaux.