Sean O'Brien

Every legend begins with a choice. Sean O’Brien’s begins with a promise.

Sean O’Brien has never broken his word. It’s a code handed down by his grandfather—and the vow he makes to his wife, Sherri, just before she dies. When grief drives him to leave the Miami Police Department, O’Brien seeks solitude in the Florida wilderness along the ancient...

A priest hears the confession of a frightened prison inmate and learns a devastating truth: a man facing lethal injection in 84 hours is innocent. The lead investigator on the high-profile case was his old friend, private investigator Sean O'Brien.

Now O'Brien has a chance to right a horrible wrong—but less than 84 hours to uncover clues to a...

Some crimes never fade. Some secrets never stay buried.

When botany graduate student Molly Monroe enters the Ocala National Forest to release rare butterflies, she stumbles upon something violent and illegal. Her discovery makes her a target—and the forest becomes a hunting ground.

Terrified for her daughter’s life, Molly’s mother turns to Sean O’...

Glenda Lawson believes her husband was the only U.S. serviceman shot and killed on American soil during World War II. But in 1945, investigators ruled that Billy Lawson died in a "mugging turned ugly."

Decades later, Sean O'Brien is learning the ropes of commercial fishing when his anchor snags on something underwater—a German U-boat partially...

When Courtney Burke appears at Ponce Marina on a humid summer morning, she leaves private investigator Sean O'Brien with a haunting tale—one that could lead him down a path beginning with a brutal rape forty years earlier and family secrets spawned from the desecration of the innocent.

Courtney is linked to a series of carnival murders. Police...

When an old man sees an unidentified Civil War photograph of a woman in the newspaper, he begins a desperate search for a 160-year-old painting. If he can find it, and if the woman in the painting matches the photograph, it will prove his great-great-grandfather didn't run from battle—clearing a family name tarnished for generations.

He hires...

Caroline Harper still thinks of her brother Andy every day. For more than fifty years, she's carried the memory of the last time she saw him—when he left home to spend thirty days at Florida's largest reform school. Her family was told Andy ran away in the middle of the night. She never believed it.

Sean O'Brien receives a letter from a dead man....

When Joe Billie stops a grave robber from desecrating a Seminole Indian burial site, he becomes the prime suspect in a bizarre murder. Facing first-degree murder charges, Joe is evasive—even with his old friend, private investigator Sean O'Brien.

O'Brien thinks he knows why Joe won't talk, but proving his friend's innocence will send him deep...

Private investigator Sean O'Brien stops near the Florida Everglades to buy flowers for a woman—a simple gesture that leads him into a deadly web of deceit, greed, and murder.

Botanist Chester Miller has devoted his life to restoring rare ghost orchids in the Everglades. But when he ventures deep into the glades and witnesses something that...

The world has always been fascinated by the myth of mermaids. But when the body of a young woman in a mermaid tail washes ashore on a Florida beach, the line between fantasy and murder dissolves.

Police dismiss it as an accident—perhaps connected to a big-budget movie filming nearby. But when a second girl, a mermaid performer at a local theme...

Former college professor Walt Baker is on the verge of the find of a lifetime. More than 300 years ago, a legendary Spanish galleon sank in a hurricane off the Florida coast, carrying treasure worth an estimated ten billion dollars in today's market. Now, after years of searching, he's finally located it on the ocean floor.

But with ten billion...

Sean O'Brien stops to help a young girl retrieve money she dropped in traffic. It's a brief encounter, but her story stays with him. Days later, he sees her face again—on the evening news. She's vanished.

As the case goes cold and authorities move on, Sean can't let it go. To find her, he must descend into the dark web and infiltrate a global...

Sean O'Brien's wedding plans are shattered when an old friend—a former Delta Force operator—arrives with devastating news: his healthy college-aged son has mysteriously died. Desperate for answers, he turns to the one man he trusts to uncover the truth.

What begins as a search for justice quickly reveals a sinister pattern linking multiple...

When rumors spread that a remote Florida spring can suspend aging, Gideon Wright becomes a marked man. With killers circling and billions at stake, he turns to investigator Sean O’Brien to protect a discovery that could change human life forever—or destroy everyone who knows it exists. O’Brien must stop those determined to steal the real...

A parade. A secret. A plot that could change the world.

When Sean O’Brien notices a small but troubling anomaly at a Veterans Day parade, he has no way of knowing it is the first signal of a plot so catastrophic it could alter the balance of power across the globe.

A secretive organization born in the shadows of World War II and the Nuremberg...

When thieves steal the trawler Gypsy from a Florida marina, they don’t just take a boat—they steal the retirement dreams of an elderly couple who happen to be close friends of Sean O’Brien. Tracking the vessel beyond U.S. waters and toward the Bahamas, Sean enters a lawless world of international boat theft, corruption, and modern-day piracy.

...

Seven years after a murder conviction, Jennifer Harmon—a woman with terminal cancer—approaches private investigator Sean O'Brien with a stunning revelation: the police convicted the wrong man. As the alibi who never came forward, Jennifer now seeks redemption before she dies. When detectives refuse to reopen the case, O'Brien takes it on, only...