Private Investigators Mysteries

Max - an elderly Paris bookstall owner - is abducted at gunpoint. His friend Hugo Marston, head of security at the U.S. embassy, launches a search. His investigation reveals that Max was a Holocaust survivor and later became a Nazi hunter. Is his disappearance somehow tied to his grim history, or even to the mysterious old books he sold? Before long, other booksellers start to disappear, their bodies found floating in the Seine. Then Marston himself becomes a target of the unknown assassins.

As the youngest of the five Walsh girls, Helen has had a tough time finding her way in the world. At 33, her job as a private investigator has proven less than fruitful and after losing her apartment, she’s moved back in with Mammy Walsh. In desperation, Helen takes on a case to locate the missing member of a once wildly popular boy band. The only hitch is that she has to work with her ex-boyfriend.

September 1909, and Lady Hardcastle and her maid, Florence, have been invited to Lord Riddlethorpe’s country estate for a week of motor racing and parties. They both agree that it sounds like a perfectly charming holiday. But when one of the drivers dies in a crash during the very first race, they discover that what seemed like an uncharacteristic error in judgement may have a more sinister explanation...

Meet Roy Ballard, freelance videographer with a knack for catching insurance cheats. He's working a routine case, complete with hours of tedious surveillance, when he sees something that shakes him to the core. There, with the subject, is a little blond girl wearing a pink top and denim shorts - the same outfit worn by Tracy Turner, a six-year-old abducted the day before. When the police are skeptical of Ballard's report - and with his history, who can blame them? - it's the beginning of the most important case of his life.

Fall 1889: Lady Rotherton has arrived from London intent on chaperoning her niece Prudence through a New York social season to find a suitable husband. It's certainly not her niece's devilishly handsome partner in Hunter and MacKenzie Investigative Law. Aunt Gillian's eye for eligible suitors is surpassed only by her ability to discern genuine gems from nearly flawless fakes. At the Assembly Ball at Delmonico's, she effortlessly determines that the stones in the spectacular diamond waterfall necklace adorning the neck of the wife of banker William De Vries are fake.

Henry Parker's life is looking up. He just landed his dream job as a reporter at the renowned New York Gazette, has a great girlfriend, and the world at his fingertips. Henry is smart. Ambitious. Determined. He's ready to take the world by storm. But Henry's dream is about to turn into a nightmare.... On his first assignment, a man ends up dead, and Henry finds himself on the run and accused of murder. On his trail is a dogged cop who wants to see Henry behind bars, and a ruthless, demented assassin who wants to see Henry dead. Henry's only hope of survival is a woman he barely knows.

A new novel from Mulholland Books / Little, Brown and Company, publishing September 2025.

The Paradise Men's Softball League has wrapped up another game, and Chief of Police Jesse Stone is lingering in the parking lot with his teammates, drinking beer, swapping stories of double plays and beautiful women in the late-summer twilight. But then someone makes a horrifying discovery at a nearby lake: At the water's edge, facedown, is something that used to be a girl.

Werebear shifter Annette Garsea is a caseworker for the Interspecies Placement Agency. When a selectively mute and freakishly strong teen werewolf is put in her custody, Annette has to uncover the young girl's secrets if she's to have any hopes of helping her. And not even the growling of a scruffy private investigator can distract her from her mission....

Professor Olive Twist has come to Zinnia, Mississippi, to study a mysterious grave wherein lies the Lady in Red, a perfectly preserved and stunningly beautiful but unnamed and unclaimed body. Olive claims she can not only identify the corpse, she can also prove the woman’s scandalous role in the nation’s history. Olive takes it a step too far, though, when she starts connecting elite Zinnia families with the same scandal. Dander up, Zinnia’s society ladies know only one way to handle Olive: They call on the private investigative services of Sarah Booth Delaney.

July 1910. Lady Hardcastle and her tireless sidekick Flo have finally embarked on a long-overdue seaside break. But just as they’re wavering between ice creams and donkey rides, their fellow guests start to go missing - and the duo find themselves with a hysterical hotel manager and a case to solve. The first to disappear is Dr Goddard, a scientist doing something terribly top-secret for the government.

The story is not your typical murder mystery. The sleuth is not a detective, private eye, or lawyer. He's an ordinary guy with an extraordinary dog. Jacob Martin is trying to make the best of a divorce and mid-life crisis when he gets a call at two o'clock Sunday morning from his mother. His sister has been arrested for the murder of her fourth husband, and his father is near death. Thus begins an adventure that takes Jake and his golden retriever from their Colorado retreat to a backwater town in the Missouri Ozarks.

Private Detective Cormoran Strike is visiting his family in Cornwall when he is approached by a woman asking for help finding her mother, Margot Bamborough - who went missing in mysterious circumstances in 1974. Strike has never tackled a cold case before, let alone one 40 years old. But despite the slim chance of success, he is intrigued and takes it on; adding to the long list of cases that he and his partner in the agency, Robin Ellacott, are currently working on.

To most people, Jamaica is sun, sea, and rum drinks by the pool. But Miami Jones and Danielle Castle don't vacation like most people. After witnessing an assault on a young man in Montego Bay, Miami and Danielle are hired to protect a young athlete with Olympic dreams. But there are lots of athletes with those dreams, and not all of them play by the rules.

Christmas is just around the corner, and Sarah Booth and Tinkie are preparing for a festive holiday season. After a turbulent season of solving cases, they're ready for some holiday cheer. Sarah Booth and Sheriff Coleman Peters have finally gotten together, and this is the first holiday they're celebrating as a couple. Sarah Booth busies herself with decking the halls and daydreaming about romantic Christmas nights with Coleman. Then her friend Cece Dee Falcon shows up needing Sarah Booth's help.

Las Vegas is a city of contradictions: seedy and glamorous, secretive and wild, Vegas attracts people of all kinds - especially those with a secret to hide, or a life to leave behind. It's the perfect location for Lester Olsen's lucrative business. He gets to treat gorgeous, young women to five-star restaurants, splashy shows, and limo rides - and then he teaches them how to kill. Private Jack Morgan spends most of his time in Los Angeles, where his top investigation firm has its headquarters.

Franki Amato is in Venice to celebrate her best friend’s Christmas Eve nuptials. She’s looking forward to a relaxing break from the PI grind and a romantic gondola ride with her Casanova. But when a chef goes belly-up after making violet risotto for the reception, her holiday plans start sinking like La Serenissima. Dead set on finding the killer and saving her BFF’s wedding, Franki navigates the city’s streets and canals, which are darker and more twisted than catacomb tunnels, and all while the ghosts of past and present are quite literally haunting her.

An academic so conservative he thought Ronald Reagan was a pinko, Hale Markham rules Prescott University like an intellectual tyrant - until the morning he’s found dead at the bottom of one of Prescott’s famously beautiful ravines. Every liberal on campus hated the crotchety old crank, but which one is responsible for giving Markham his final push to the right? The case so intrigues the incomparable, reclusive master detective Nero Wolfe that he takes the unusual step of leaving the confines of his home.

Immortal not-ghost Wes Cooper and his vampire partner, Hudson Rojas, have it all - rewarding private investigation work, great friends, and, most important, a love that's endured. But ever since Wes sent a demon screaming back to the beyond, his abilities have grown overpowering and overwhelming. He's hiding the fact that he's losing control the best he can, but it's hard to keep anything a secret for long when your partner's a former cop...and especially when your partner's a former cop who wants to move in together.

Far beneath the sands of Alexandria, an archaeological team digs deeper than anyone has before, seeking an ancient power older than the pyramids. What they unearth is an evil that threatens the whole world. First it targets the worst of humanity: Ex-Nazis, Central American warlords, and the pushers who peddle drugs to children are found massacred, ripped limb from limb without having fired a shot in their own defense. But the next to die will be ordinary people.