When eight-year-old Daisy Mason vanishes from her family's Oxford home during a costume party, Detective Inspector Adam Fawley knows that nine times out of 10, the offender is someone close to home. And Daisy's family is certainly strange - her mother is obsessed with keeping up appearances, while her father is cold and defensive under questioning. And then there's Daisy's little brother, so withdrawn and uncommunicative.... DI Fawley works against the clock to find any trace of the little girl, but it's as if she disappeared into thin air - no one saw anything; no one knows anything.

When 25-year-old Beth Mullen returns home, expecting to find her twin Rachel waiting for her, the silent house sends a shiver down her spine. She races upstairs to find her beautiful beloved sister cold in her childhood bed, her sparkling blue eyes closed forever, the morning after attending a glittering party.... Newly engaged Detective Lottie Parker knows that Rachel has been murdered the minute she enters the bedroom. Rachel’s neck is bruised and a shard of glass placed in her throat. Confronted with such a horrifying killing, Lottie wastes no time in pursuing every clue. 

When Isabel Gallagher is found murdered on the floor of her baby’s nursery by her mother, it’s a grueling case for Detective Lottie Parker. Isabel’s pajamas have been ripped, her throat cut and an old-fashioned razor blade placed in her hand. As Lottie looks at the round blue eyes and perfect chubby cheeks of Isabel’s baby daughter, she can’t understand who would want to hurt this innocent family.

The Oxford Literary Festival is in full swing, but Detective Inspector Bridget Hart isn't there to learn about books. Instead, she's been given the task of protecting Diane Gilbert, a controversial author who has received a death threat. Diane doesn't seem to think she needs Bridget's protection, but when the worst happens, Bridget's role switches to running a murder enquiry.

One moonlit night, the bodies of two young people are discovered lying entwined on a blanket in the woods. The young man is clutching a red rose. It appears to be a lovers' suicide pact.... Until Detective Nikki Galena and DS Joseph Easter look more closely. Romeo and Juliet, as they decide to call them, were murdered somewhere else and brought to the woods. But why? Then another young couple are found dead, again beautifully posed as lovers. 

On a hot summer night, a scientist from the Centers for Disease Control is grabbed by unknown assailants in a shopping center parking lot. Vanished into thin air, the authorities are desperate to save the doctor. One month later, the serenity of a sunny Sunday afternoon is shattered by the boom of a ground-shaking blast - followed by another seconds later. One of Atlanta's busiest and most important neighborhoods - the location of Emory University, two major hospitals, the FBI headquarters, and the CDC - has been bombed.

When Amy Whyte and Penny Brogan leave a nightclub in the early hours of Sunday morning and don’t arrive home, their families are beside themselves with worry. Conor Dowling has just been released from prison, a man full of hatred for Amy, the girl who put him behind bars in the first place. The case is given to Detective Lottie Parker when the girls’ blood-soaked bodies are found, days later, in a derelict squat. Chillingly, both girls are clutching silver coins in their hands - what message is this killer leaving behind? All the signs point to Conor, but his alibi is watertight.

As funeral mourners stand in silence at Ragmullin cemetery, a deafening cry cuts through the air. Lying crumpled at the bottom of an open grave is the bloodied body of a young woman, and Detective Lottie Parker is called in to investigate. Knowing the body can’t have been there long, Lottie wonders if it could be Elizabeth Bryne, a young woman who vanished without trace just days earlier. And with a new boss who seems to have it in for her, Lottie is under pressure to solve both cases quickly.

A woman is found face-down in a pool of blood. Detective Lottie Parker is called to the remote farmhouse in the bleak Irish countryside. Inside, she finds a scene that speaks of uncontrollable rage: glasses smashed, chairs ripped apart, the woman’s body broken. A black rain jacket makes Lottie think she knows the killer’s identity, but then she finds a disturbing clue: is the murder linked to an old case at St Declan’s asylum - a case investigated by her own father, just before he took his life?

The young woman standing on Lottie's step was a stranger. She was clutching the hand of a young boy. "Help me," she said to Lottie. "Please help me." One Monday morning, the body of a young pregnant woman is found. The same day, a mother and her son visit the house of Detective Lottie Parker, begging for help to find a lost friend.