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.

An old flame has returned to Chief Inspector Frederick Troy's life: Kitty Stilton, wife of an American presidential hopeful. Private eye Joey Rork has been hired to make sure Kitty's amorous liaisons with a rat pack crooner don't ruin her husband's political career. But he also wants to know why Kitty has been spotted with Danny Ryan, whose twin brothers, in addition to owning one of London's hottest jazz clubs, are said to have inherited the crime empire of fallen mobster Alf Marx. Before Rork can find out, he meets a gruesome end.

London, 1944. While the Luftwaffe makes its final assault on the already battered British capital, Londoners rush through the streets, seeking underground shelter in the midst of the city's blackout. When the panic subsides, other things begin to surface along with London's war-worn citizens. A severed arm is discovered by a group of children playing at an East End bomb site, and when Scotland Yard's Detective Sergeant Frederick Troy arrives at the scene, it becomes apparent that the dismembered body is not the work of a V-1 rocket.

It is 1941. Wolfgang Stahl, an American spy operating undercover as an SS officer, has just fled Germany with Hitler's henchmen on his trail. He is carrying valuable cargo - the blueprint of the Führer's secret plan to invade Russia. Stahl's man in the American embassy, the shy and sheltered Calvin M. Cormack, is teamed with a boisterous MI5 officer, Walter Stilton, to find the spy and bring him to safety. Their investigation takes them across war-torn London, from the shelled-out blocks to the ubiquitous pubs to the underground counterfeiting shops; and in Cormack's case, into the arms of Kitty, his partner's rambunctious daughter.

England in 1963 is a country set to explode. The old guard, shocked by the habits of the war-baby youth - sex, drugs, and rock and roll - sets out to fight back. The battle moves uncomfortably close to Chief Inspector Troy. While Troy is on medical leave for a nasty case of tuberculosis, the Yard brings charges against an acquaintance of his, a hedonistic doctor with a penchant for voyeurism and uninhibited young women.

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.

The story opens with the apparently accidental drowning of a sixth form student in the Norfolk countryside. As a matter of routine, or so it seems, the case passes across the desk of Detective Sergeant Smith, recently returned to work after an internal investigation into another case that has led to tensions between officers at Kings Lake police headquarters. As an ex-DCI, Smith could have retired by now, and it is clear that some of his superiors wish that he would do so.

Northern Ireland, spring 1981. Hunger strikes, riots, power cuts, a homophobic serial killer with a penchant for opera, and a young woman’s suicide that may yet turn out to be murder: on the surface, the events are unconnected, but then things—and people—aren’t always what they seem. Detective Sergeant Duffy is the man tasked with trying to get to the bottom of it all. It’s no easy job—especially when it turns out that one of the victims was involved in the IRA but was last seen discussing business with someone from the loyalist Ulster Volunteer Force.

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.

1942: a German spy comes ashore on a desolate stretch of Lincolnshire beach. But he is hunted down by a young detective, Richard Prince. The secret services have need of a man like him.... In occupied Europe, Denmark is a hotbed of problems for British intelligence. Rumours of a war-ending weapon being developed by the Germans are rife. Sent to Copenhagen, Prince is soon caught in a deadly game of cat and mouse. Dodging Gestapo agents, SS muscle and the danger of betrayal, his survival - and the war effort - hangs in the balance.

Lachlan Kite is a member of BOX 88, an elite transatlantic black-ops outfit so covert that not even MI6 and the CIA are certain of its existence - but even the best spy can't anticipate every potential threat in a world where dangerous actors lurk around every corner. At the funeral of his childhood best friend, Lachlan falls into a trap that drops him into the hands of a potentially deadly interrogation, with his pregnant wife, also abducted, being held as collateral for the information he's sworn on his own life to protect.

Nat, a 47 year-old veteran of Britain’s Secret Intelligence Service, believes his years as an agent runner are over. He is back in London with his wife, the long-suffering Prue. But with the growing threat from Moscow Centre, the office has one more job for him. Nat is to take over The Haven, a defunct substation of London General with a rag-tag band of spies. The only bright light on the team is young Florence, who has her eye on Russia Department and a Ukrainian oligarch with a finger in the Russia pie.

Julian Lawndsley has renounced his high-flying job in the city for a simpler life running a bookshop in a small English seaside town. But only a couple of months into his new career, Julian’s evening is disrupted by a visitor. Edward, a Polish émigré living in Silverview, the big house on the edge of town, seems to know a lot about Julian’s family and is rather too interested in the inner workings of his modest new enterprise.

A reluctant ex-spy with demons of her own, Elinor finds herself facing down one of the most dangerous organized crime gangs in London, ultimately exposing corruption from Scotland Yard to the highest levels of government. The private, quiet “Miss White" as Elinor is known, lives in a village in rural Kent, England, and to her fellow villagers seems something of an enigma. Well she might, as Elinor occupies a "grace and favor" property, a rare privilege offered to faithful servants of the Crown for services to the nation.

Shane Collins, a world-weary CIA spy, is ready to come in from the cold. Stationed in Bahrain off the coast of Saudi Arabia for his final tour, he has little use for his mission—uncovering Iranian support for the insurgency against the monarchy. Then Collins meets Almaisa, a beautiful and enigmatic artist, and his eyes are opened to a side of Bahrain most expats never experience, to questions he never thought to ask.