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.

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.

Haller is a Lincoln Lawyer, a criminal defense pro who operates out of the backseat of his Lincoln Town Car, to defend clients at the bottom of the legal food chain. It's no wonder that he is despised by cops, prosecutors, and even some of his own clients. But an investigator is murdered for getting too close to the truth and Haller quickly discovers that his search for innocence has taken him face to face with a kind of evil as pure as a flame.

Titus Crown is the first Black sheriff in the history of Charon County, Virginia. In recent decades, quiet Charon has had only two murders. But after years of working as an FBI agent, Titus knows better than anyone that while his hometown might seem like a land of moonshine, cornbread, and honeysuckle, secrets always fester under the surface. Then a year to the day after Titus’s election, a school teacher is killed by a former student and the student is fatally shot by Titus’s deputies. As Titus investigates the shootings, he unearths terrible crimes.

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.

One early morning on a Norfolk beach in Virginia, a dead body is discovered by a man taking his daily swim—Arman Bajalan, formerly an interpreter in Iraq. After narrowly surviving an assassination attempt that killed his wife and child, Arman has been given lonely sanctuary in the US as a maintenance worker at the Sea Breeze Motel. Now, convinced that the body is connected to his past, he knows he is still not safe.

When Anna Bradshaw wakes up in a hospital bed in London, she remembers nothing, not even her loving husband, Stephen. The doctors say her amnesia is to be expected, but Anna feels cut adrift from her entire life. In Bristol, Livvy Nicholson is newly married to Dominic and eager to get back to work after six months’ maternity leave. But when Dominic’s estranged mother appears, making a series of unnerving claims, Livvy is sucked into a version of herself she doesn’t recognise.

Edwin St. Andrew is eighteen years old when he crosses the Atlantic by steamship, exiled from polite society following an ill-conceived diatribe at a dinner party. He enters the forest, spellbound by the beauty of the Canadian wilderness, and suddenly hears the notes of a violin echoing in an airship terminal—an experience that shocks him to his core.

Adelaide Hills, Christmas Eve, 1959. At the end of a scorching hot day, a local deliveryman makes a terrible discovery. A police investigation is called, and the small town of Tambilla becomes embroiled in one of the most shocking and perplexing murder cases in the history of South Australia. Many years later and thousands of miles away, Jess is a journalist in search of a story. Having lived and worked in London for nearly two decades, she now finds herself laid off from her full-time job and struggling to make ends meet. Until a phone call out of nowhere summons her back to Sydney.

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.