Fifteen years ago, a serial killer was on a rampage murdering young women in Middlehampton. Then, suddenly, the killings stopped, and the murderer was never found… So when the body of another young woman is found bearing the twisted killer’s unique hallmark—the overpowering stench of lavender and an origami heart—DS Kat Ballantyne knows this can only mean one thing: the killer is back.

Detective Inspector Stella Cole was a rising star in London’s Metropolitan Police. Then a hit-and-run driver killed her husband, Richard, a human rights lawyer. Grief drove her to booze and pills. Back at work after a year’s compassionate leave, Stella secretly re-investigates his death and begins to suspect a cover-up. Freelance journalist Vicky Riley was working with Richard to expose corruption buried deep inside the legal system. Unaware that powerful people are out to stop her, she contacts Stella.

Barely a month since his promotion to Inspector, DI Ford is called in to investigate the murder of a young nurse and her son in a small flat in Salisbury. There are few clues, and no apparent motive, but Ford can sense that there's a serial killer at work. After all, he knows from brutal personal experience how killers cover their tracks.... It's been six years since Ford lost his wife in a climbing accident - an accident he caused. He is desperate to keep the truth hidden, especially from his son, Sam.

As bogus corruption charges loom over her, DS Kat Ballantyne finds herself deskbound and stuck with cold cases. Her hated boss, DI Carver, has given her just one week to explain how £50,000 found its way into her bank account. If she can’t, she’ll be lucky to have a desk at all. Then a close friend calls her from a murder scene, claiming to have strangled a local gangster’s wife. Kat has no choice but to disobey orders and investigate. Despite overwhelming forensic evidence supporting her friend’s confession, something still doesn’t add up…

When you want to take power, call the SAS. A right-wing billionaire is standing for Parliament. He enlists the help of ex-SAS soldier, Gabriel Wolfe. Gabriel left the Army after a covert mission went disastrously wrong and has sworn never to cause another man's death. It quickly becomes clear that Sir Toby Maitland's ambitions extend far beyond a seat as an MP. When an ex-contact in Swedish Special Forces, now working for MI5, contacts Gabriel, he realises he has little choice but to try to stop his employer.

Starting a new life in Snowdonia was always DI Ruth Hunter's dream. Until a twisted killer turned it into her worst nightmare. Detective Inspector Ruth Hunter lives with the pain of her partner’s mysterious and unsolved disappearance. About to hit 50, the veteran police officer trades in the crime-ridden streets of London for a more peaceful life in rural North Wales. But Ruth has barely settled into her new position in North Wales Police, when the body of a brutally murdered woman is discovered...with strange symbols carved into her skin.

Meet DCI Lesley Clarke. She’s a straight-talking city copper who doesn’t suffer fools gladly…and she’s been transferred to rural Dorset. After being injured in a bomb attack, Lesley is presented with a choice - early retirement, or a period of respite in a calmer location. But things don’t stay calm for long. Before she’s even started her new job, Lesley is dragged into investigating a murder at one of England’s most iconic landmarks, the imposing Corfe Castle.

DS Rakesh Siyal is an idealist. Frustrated as an Edinburgh human rights lawyer, he joins the police, determined to solve the problems he sees with the criminal justice system from the inside, rather than out. His first day as a cop sees him sent down to Galashiels in the Scottish Borders, where he’s given a simple task – return a suspect to Glasgow to face justice.

When two young girls disappear from their primary school, the village of Heighington is put on high alert—and not for the first time. Called in to investigate, Detective Karen Hart is sure that parallels with a previous disappearance are anything but coincidental. DS Hart is still reeling from a case she tried and failed to solve eighteen months ago, when a young woman vanished without a trace. She’s no nearer to the truth of what happened to Amy Fisher, but with two children missing now, too, the stakes have never been higher.

On the muddy banks of the Calumet River, a body has been found posed next to a series of mysterious glyphs and bearing wounds from a ritualistic slaying. Chicago detective Addie Bisset knows only one man who can decipher the message left by the killer: her friend Dr. Evan Wilding. A brilliant forensic semiotician, Evan decodes the etchings as Viking Age runes. They suggest either human sacrifice or righteous punishment. But to what god? And for what sins? Only one thing is clear from the disturbing runic riddles: there are more victims to come.