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Kerry Costello Books

Gripping Crime Thrillers

Murders. Mysteries. Thrillers. And heroes who never give up.

Murder |Mystery |Thrillers
The Frankie Armstrong Five Book Thriller Series

A former British Special Forces Soldier. A new life in Florida. A talent for finding trouble in all the wrong places.

The John Gibson Three Book Mystery Series
A retired British detective.
A darker side to paradise. Some crimes refuse to stay buried.

About Kerry Costello

Kerry Costello was born in England, of Irish heritage – and as any Irishman will tell you, storytelling is in the blood.

After building and selling a series of successful travel businesses over three decades, Kerry traded boardrooms for laptops and set out to do what he’d always wanted: write gripping crime thrillers that keep readers up well past midnight. Inspired by the giants of the genre – Raymond Chandler, Harlan Coben, James Lee Burke, and Carl Hiaasen – Kerry brings the same sun-drenched atmosphere, larger-than-life characters, and razor-sharp plotting to his own fiction. His home in Naples, Florida, provides an endless well of inspiration. “The people you meet almost daily in Florida,” he says, “provide a rich seam of material for any writer.”

His debut thriller You Owe Me introduced readers to Frankie Armstrong — a battle-hardened British ex-soldier with a debt to repay and a talent for finding trouble in all the wrong places. The Frankie Armstrong series now spans five books, each set against the vivid backdrop of Florida’s sun-soaked coast and dark criminal underworld.

When he’s not writing, Kerry can be found fishing, cooking, or travelling the world with his wife Lyn. Start the series with You Owe Me — and see why readers say they simply couldn’t put it down.

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Reader Reviews

What Readers Are Saying

★★★★★
The Long Game

“Police work that goes the extra mile”

My favorite genre is mystery thrillers and this one tops my list right now. The intricate work in this book kept me on the edge and never in a million years did I see the ending. Loved the author's details and descriptions.
★★★★★
Florida Shakedown

“Great reading - read them all!”

Florida Shakedown immediately grabs you. The characters are believable, the story lines interesting and the endings always have a little twist. I usually read to help me fall back to sleep - these books don't allow me that pleasure as I can't put them down!
★★★★★
Florida Clowns

“Another really good story”

I am absolutely hooked on Gibson. There is so much going on in this story with a degree of humour too. I really have to repeat what a good story this is and it deserves the five stars I am giving.
★★★★★
Perfect Morning

“Suspenseful and entertaining”

Few books can keep me so engrossed, but this masterfully crafted narrative did just that. The vivid descriptions of the scenic, exotic locales heightened the suspense and concern for the terrified pair.
★★★★★
You Owe Me

“Don't Bet On It”

The author has weaved a clever little tale for the reader. Kerry sets the story up early and then sends you at warp speed to the end. A five-star cleverly written book.
★★★★★
CONDO

“I was lost in Naples, Florida...”

The story captured my attention and held me hostage from the first chapter. There were more twists and turns in this story than a roller coaster. Just when I thought I had all the answers, another clue made me second-guess myself.
★★★★★
IRMA

“Another Winner from Kerry Costello”

IRMA is an easy, fun read, highlighted by interesting plot twists and a most enjoyable touch of Gaelic whimsy. I heartily recommend purchase.
★★★★★
Reader Review

“One of the Most Riveting Novels Ever!”

Costello is a creative and gifted master of writing complex but easy to read stories. We need more like him!
★★★★★
Hurricane Irma

“Amazing Read”

This is book number three in this amazing series and I have loved reading it very much. I highly recommend this story to everyone.
★★★★★
Backlash

“Dark turn”

Perhaps the most gripping book in the series. Lots of twists and turns kept my attention through to the end, with a satisfactory ending that ties up all the loose ends.