Railway cop and former Marine Sydney Parnell is on the hunt. So is a killer she knows only as the Alpha. They’re in a race to find Malik, an 11-year-old Iraqi boy with secrets to guard. Sydney wants to help him. The Alpha wants him dead. From the dark alleys of Mexico City to the mean streets of Denver, Sydney and her K9 partner, Clyde, use their wits and determination to chase down the ruthless killer. But when their path collides with his, Sydney realizes just how far-reaching and sinister the Alpha’s past is. And how far he’s willing to go to save his secrets.

Former Naval Intelligence Officer turned secret operative Jake Pendleton finds himself in a pulse-pounding race to stop a cyber-terrorist from releasing a string of the most heinous cyber-crimes the world has ever seen. Crimes that could render the world's advanced technology useless. Jake teams with his partner, Francesca Catanzaro, to track down their only lead, a white-hat hacker in Italy known only as The Jew. A man who might hold the key to stop a group of black-hat hackers from causing worldwide chaos - tag named Disruption.

On Christmas Eve, DCI Mackenzie Jones is called to a shooting at a remote farmhouse. Ralph Mallender believes his father lies dead inside. When three more bodies are discovered, it's clear a festive family gathering has turned into a gruesome tragedy. At first it seems like an open and shut case: a murder suicide committed by Ralph's volatile brother Cameron. Then new evidence makes Mack suspect the man who reported the crime is in fact the perpetrator. But Mack isn't the only one with a stake in the case.

The Vermont Bureau of Investigation (VBI) has been pulled onto three cases at the same time; meanwhile, VBI head Joe Gunther has to take time off to care for his ailing mother. Those cases are now in the hands of the individual investigators. Sammie Martens is assigned a murder case. The victim is a young woman, the roommate of the daughter of medical examiner Beverly Hillstrom. A recent transplant from Albany, New York, Sammie must find out what put a hit man on the trail of this seemingly innocent young woman.

In the darkness of a cold December morning, Detective Kim Stone steps through the doors of Halesowen Police Station. She’s about to meet her team for the first time. When the body of a young man is found beheaded and staked to the ground in a secluded area of the Clent Hills, Kim and her new squad rush to the crime scene. This audio edition includes exclusive bonus content.

Henry North is a down-on-his-luck cybersecurity expert from New Orleans. Adam Zhang is the cofounder of one of Austin’s most successful venture capitalist firms. These two men didn’t know each other. They had never met. Yet they died together, violently, in a place neither had any business being. When Henry doesn’t return from a business trip, his wife, Kirsten, panics - and then gets an anonymous phone call: “Your husband is dead in Austin.”

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.

On her first day of kindergarten, five-year-old Tinsley disappeared without a trace... Five agonizing years later, her divorced mother, Dani Callahan, is a private investigator. She and Quinn Sullivan, a promising young assistant determined to prove herself, are devoted to helping others find missing loved ones. And for Dani, finding Tinsley is still a never-ending obsession.

Everyone in the small town of Denton is searching for Isabelle Coleman, a missing 17-year-old girl. All they've found so far is her phone and another girl they didn't even know was missing. Mute and completely unresponsive to the world around her, it's clear this mysterious girl has been damaged beyond repair. All Detective Josie Quinn can get from her is a name: Ramona. Currently suspended from the force for misconduct, Josie takes matters into her own hands as the name leads her to evidence linking the two girls.

Lila Nash is on the verge of landing her dream job - working as a prosecutor under the Hennepin County Attorney - and has settled into a happy life with her boyfriend, Joe Talbert. But when a woman is pulled from the Mississippi River, barely alive, things in the office take a personal turn. The police believe the woman’s assailant is local photographer Gavin Spenser, but the case quickly flounders as the evidence wears thin. It seems Gavin saw this investigation coming - and no one can imagine how carefully he has prepared.

Something mysterious is killing the wildlife in the mountains just south of Tucson. When a college intern turned activist sets out to collect her own evidence, she, too, ends up dead. Local law enforcement is slow to get involved. That’s when the mobile FBI unit goes undercover to infiltrate the town and its copper refinery in search of possible leads.

For three years, Detective Jude Fontaine was kept from the outside world. Held in an underground cell, her only contact was with her sadistic captor, and reading his face was her entire existence. Learning his every line, every movement, and every flicker of thought is what kept her alive. After her experience with isolation and torture, she is left with a fierce desire for justice - and a heightened ability to interpret the body language of both the living and the dead.

In the remote forests of Stillwater, Minnesota, you can scream for days and no one will hear you. So when the bodies of two 15-year-old girls are discovered frozen in the snow, Special Agent Nikki Hunt is sure the killer is local: Someone knew where to hide the girls and thought they would never be found. Though Nikki hasn’t been home in 20 years, she knows she must take over the case.

McGee Ridge, earthquake-rattled and clinging to the thousand-foot cliffs of the Northern California coast, is nestled in one of a very few truly wild places left in the Lower 48. It is also home to a band of off-grid outlaws who vanished behind the famed Redwood Curtain in the 1960s and whose time there is swiftly coming to an end.

Was the biggest case of his career the worst mistake he ever made? Ten years ago, DCI Jack Logan stopped the serial child-killer dubbed "Mister Whisper", earning himself a commendation, a drinking problem, and a broken marriage in the process...When another child disappears a hundred miles north in the Highlands, Jack is sent to lead the investigation and bring the boy home. But as similarities between the two cases grow, could it be that Jack caught the wrong man all those years ago?