Darcy McClain and Bullet Thriller Series

These books can be read as standalones.


Book 4 Now Available!

Out for a run in Keller, Texas, former FBI Special Agent Darcy McClain and her giant schnauzer Bullet find a canvas sack submerged in a creek. Inside are the pulverized remains of renowned geneticist Dr. Catherine (Cate) Lord, who has been receiving death threats for her alleged research on human cloning.

The Lord family pressures Darcy to assist with the investigation, but she isn’t interested—until she receives an email from Cate prophesying her own demise. Digging for clues, Darcy hacks into Cate’s computer and discovers a legal document that casts suspicion squarely on the Lord brothers.

The legal document, and the revival of a cold case, jeopardizes Cate’s murder investigation and leads Darcy into a deadly confrontation with the Lord family.

Praise for CLON-X

In Pat Krapf’s fourth and best thriller yet, expect the unexpected. An invited change of scenery places Darcy and Bullet in North Texas. As always, we get vivid descriptions of the settings as the beloved sleuths, and relatives from previous books, reunite with new and interesting characters. Don’t miss out on this one!
—Kathy Penak

This is a well written book and keeps you in suspense to the end. I’ve read all of the “Bullet” books and this might be one of the best!
—Amazon Customer

From the opening chapter to the final surprise, CLON-X will have you turning the pages long into the night. The suspense is high, the pace is fast, and the possibility of a bit of romance brewing in the background gives the reader just enough of a breather to tackle the next chapter.
—Amazon Customer

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Book 3

Sean Ireland, the first gay presidential candidate in US history, is guaranteed the election—until he’s found dead at the Palace of Fine Arts in San Francisco.

Stunned by her friend’s murder, private investigator Darcy McClain is determined to hunt down Sean’s killer. In shock, she returns home to find someone has broken in, assaulted her sister, and stolen Bullet, her giant schnauzer.

While frantically searching for Bullet, Darcy’s worst fears are realized. She finds a tranquilizer dart, shot from a crossbow, lying in her backyard. Only one person she knows uses such a weapon—Solis, a rogue CIA agent who, years earlier, tried to kill Darcy.

After Sean’s death, more grisly murders follow, leading the police to suspect a serial killer. Darcy isn’t convinced. But before she can pursue her hunch, she is framed for Sean’s murder. On the run from the law, Darcy is forced to go under-ground to solve the murders and to get Bullet back.

In the course of her investigation, she is astounded to discover evidence of a high-level government conspiracy to exterminate gays and lesbians. Thousands are already dying horrible deaths. Is Solis part of the conspiracy? Is he the murderer? Taunted by Solis, who threatens to kill her dog, Darcy vows to track down her adversary, save Bullet, and discover the truth.

Praise for Genocide

An excellent action-packed mystery-thriller that touches on appalling hate crimes, twisted science and a loyalty that defies species.
—Dianne Bylo, Tome Tender Book Blog

Genocide is a book for conspiracy theorists,…those who love well-written and well-researched mysteries, and anyone who enjoys a really thought-provoking story.
—Michelle Willms, Let’s Talk About Books

A thriller that could be tomorrow’s headlines.
—Joan Nienhaus, Book Reviews From An Avid Reader

I love the clever plot twists in Gadgets.
—Gloria Peterson



Book 2

Meet The Carver—Albuquerque’s most brutal serial killer. Only one person can end his carnage—Darcy McClain. That is, if he doesn’t kill her next.

Since her parents’ deaths, former FBI Special Agent Darcy McClain has leaned on lifelong friend Randolph Colton, but now he has his own battle to fight. Severe cuts in the government’s defense budget have forced his company, Colton Aerospace, to downsize. On the verge of bankruptcy, Randolph learns Capitol Hill has awarded his firm a contract to manufacture a high-powered laser for the air force’s next generation of bombers.

However, his euphoria dies when he discovers a crack cyberspook has penetrated the firewalls of Colton’s classified databases. If the Department of Defense discovers the security breach, they will yank the contract. Randolph calls the one person who can catch the hacker: Darcy.

Before the investigation even begins, Randolph is murdered, leaving Darcy to wonder if the killer and the hacker could be one and the same. While she stalks him through the electronic corridors of Colton’s restricted operating systems, The Carver, a man indelibly scarred by his horrific past, methodically continues to exact his revenge on the Colton family. He vows that no one will stand in his way, not even Darcy McClain. But the shocking secret that drives him to revenge is something only she can uncover.

Praise for Gadgets

Excellent read! Exciting and unique thriller! Pat Krapf is my new favorite author!

Gadgets is an awesome book from start to finish! Love Pat Krapf’s writing!
—Jane Chism

I gave my sister a copy of Brainwash for Christmas, and she has already beaten me to reading Gadgets.
—Kim Loeffler

I love the clever plot twists in Gadgets.
—Gloria Peterson



Book 1

Darcy McClain has discovered unbelievable atrocities hidden deep within the basement labs at Los Alamos, and she can’t escape…

Former FBI Special Agent Darcy McClain and her partner Bullet, a giant schnauzer, are in Taos, New Mexico, when they stumble upon a flash drive in an arroyo on the property she’s inherited. The drive belongs to Los Alamos National Laboratory (LANL).

Darcy pockets it and hikes to the adobe on her land. There, she finds a pregnant teenager, Rio, searching the house for the drive, as the USB is a possible clue to the whereabouts of her missing fiancé Johnny, who works at LANL. Rio is frantic to locate him. In a strange coincidence, Darcy learns Rio is the daughter of a family friend, and bound by this bond, she agrees to help the woman find Johnny.

What begins as a missing person’s case soon escalates into a dangerous game that places Darcy’s life at stake after she infiltrates the top-secret biotech labs at LANL, where shocking neuroscientific research soon comes to light.

Praise for Brainwash

Krapf kicks serious butt with her ending… Awesome book!
—Kathryn Bullon

Excellent page-turner. I missed a few nights of sleep for this one, and I’ll do it again for her next offering!
—George Bartel

Brainwash is a don’t-put-it-down-until-you-finish read.
—Pat Davis

A glowing recommendation for Pat’s first thriller, Brainwash. Her writing not only keeps the reader entertained, but a portion of the proceeds goes to giant schnauzer rescue.
—Tina Fields

Darcy is a bold lead character and Bullet, a lovable, intelligent sidekick… Pat does a great job describing the beautiful New Mexico landscape… makes you want to visit.
—Kelly Price

Got my heart racing and at times caught myself holding my breath. Darcy’s character is a smart and gutsy lady, willing to put herself at risk to solve a mystery.
—Kaycee Calaway

Don’t blink because you might miss something.
—Brenda Cejka