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NIKI UNDERCOVER (A Niki Undercover Thriller #1)

PUBLICATION DATE September 16, 2025

Two years undercover. One phone call. Zero margin for error.

FBI Agent Ashley Prescott has spent two years undercover as Niki Foster, earning the trust of Patriots for Freedom—an extremist militia. As the Bureau’s only window into the group—and their Chinese linguist and arms go-between—she’s the only one who can stop an imminent weapons sale and their plot to tear America apart with targeted assassinations. Then her estranged billionaire father vanishes after leaking classified intel—details that threaten to expose her and could only have come from inside the FBI.

HQ plans to shut down her op, claiming she blew her cover. Ashley knows what that means: the Bureau will nab a few small fry and proclaim victory, while the militia leaders disappear, the arms shipment remains a threat, and the traitor wrecks other lives.

Racing between Minnesota to track down her father and D.C. to maintain her cover, she has ten days to stop the plot and expose the FBI leaker. With ex-SEALs closing in and her own agency against her, going rogue is her only shot at saving the country—and her own survival.

When the system turns against you, justice becomes a one-woman war.

NIKI UNDERCOVER launches an explosive new thriller series for fans of Isabella Maldonado and Karin Slaughter.

Check out the first three chapters of Niki Undercover.
Download the pdf here. Give it a read and let me know what you think.

Click this link for the Book Club Discussion Guide. Beware: it contains spoilers.

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What Readers Are Saying

This is a fantastic and amazing read!! I absolutely love it. The complexity of the characters and the story had me hooked from the start and I found myself unable to put it down. Edge of your seat and addictive, can't wait to see what could possibly happen next kind of read. If you haven't read it yet then you definitely need to. One of my many handful of new favorite reads of the year hands down.

~ Sherlene, Goodreads Review
I loved this book. Niki Undercover is a thrilling who dun-it. It had me guessing to the end. The main character is brilliant and resourceful. I really enjoyed the secondary character - Seamus McCree. This book has a great plot and the ending is very satisfactory.

~ Mark, Bookbub Review
Rapid action from very beginning. Characters have depth and even a sense of humor. The plot is intense and moves rapidly with military precision. You will more than get your money's worth with this novel.

~ Lori, Goodreads Review
I really enjoyed this story and look forward to the others in this series. I liked that Seamus appears in the book, too, although you don’t have to read the Seamus McCree series to enjoy this one. Between Niki’s FBI assignment and the issues at her father’s business, it’s non-stop action.

You won’t be disappointed.

~ Karen, Goodreads Review

Niki Undercover Thrillers

An undercover federal agent walking a knife’s edge between justice and survival.

Niki Undercover Book 1 • 09/16/2025

Niki Unleashed Book 2 • 2025

Niki Unbound Book 3 • 2026

See all Niki books Get release alerts

A Note from Jim about the Seamus McCree series

I’m often asked by people unfamiliar with Seamus McCree and his friends and family which book they should read first. Before I answer, I ask a question of my own: “Do you prefer to read series in order?” If so, start with Ant Farm. (The books are in alphabetical order to make them easy to sort.) In Ant Farm, Seamus accepts his first field assignment, and readers meet his son, Paddy, and his arch-nemesis, the Happy Reaper.

Some people don’t care a whit for chronological order and press on, asking something like, “Which is the best?” or “Which is your favorite?” My favorite story is the one I’m currently writing. When I complete that one, my favorite changes to the next story. As for which is the “best,” opinions vary. You’ll have to read them all and decide for yourself (and drop me a note and let me know your favorite).

Some folks are drawn to a particular cover (check them out below) and choose to enter the series midstream. Others read the blurbs and choose based on the hook that grabs them. Others want to read a book set in Michigan's Upper Peninsula, and I'll suggest Cabin Fever. However you choose, I hope you’ll enjoy the story.

Click on the cover to learn more about each work, download a sample, and find purchase links.