McKenzie Sisters Mystery Series

Historical Western Cozy Mysteries with a Touch of Romance

Release Date: June 22, 2021

Two sisters . . .


Rose and Cassandra (aka Casey) are no ordinary sisters. One is scientifically inclined, lives in Denver, and rides a bicycle like her life—or a case—depends on it. The other rides trains, wields a blade, and keeps her identity as a Pinkerton "under wraps." The sisters also have a knack for solving cases . . . and getting into trouble while doing it. 

Each book takes place in a different Colorado location but they happen during the same month. They are stand-alone novels and can be read in any order. The McKenzie Sisters Mystery Series was created by Samantha St. Claire.

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Image by Aidana Khabdesh


Historical Western

Cozy Mystery

Clean/Sweet Romance

Stand-Alone Novels

Part of a Series

Read in any order!

Trappers Peak Publishing

"An absolutely delightful mystery adventure that will keep you guessing till the last chapter! THE CASE OF THE COPPER KING is a must to read if you love western mysteries with a touch of romance and lots of twists and turns." —Nicole Laverdure, 5 stars

"THE CASE OF THE COPPER KING is an enjoyable western by MK McClintock . . . I really enjoyed this story. Casey is a strong woman in a man’s job, which she does really well. Along the way to Durango, Casey meets bounty hunter, Quinn Morgan. I think looking for a murderer just got more interesting. I really enjoyed the interaction between Casey and Quinn . . . This was a wonderful western." —Goodreads review, 5 stars

"This intrepid heroine kept me guessing till the end and made me laugh out loud! Rose is the epitome of the perfect heroine that I love to follow. She’s colorful, amusing, ingenious, and brilliant. I loved the setting Colorado 1899 and the atmosphere with a delightful blend of humor and adventure."

—Books & Benches, Top Pick (on The Case of the Peculiar Inheritance)

"This book was so good! It's well written and full of action, drama, suspense, and a mystery to solve. It is full of twists and turns and will keep you guessing until the end. Once you start reading this book you can't put it down, you just have to know what happens next." Goodreads review, 5 stars

The Case of the Peculiar Inheritance

Witty and irascible Rose McKenzie tackles Denver’s criminal cases with a woman’s intuition and a loaded Smith and Wesson tucked in her skirt pocket.


Eager for adventure beyond her scientific experiments, Rose accepts her uncle’s challenge to become Denver’s first female private detective. When a wealthy woman employs her to track down a burglar, Rose zealously applies her unique investigative talents to prove she can handle any job. After two more home invasions turn violent, Rose races to find the perpetrator before another innocent shows up on a slab at the city morgue.


With the stakes raised, Rose employs the help of her friend, the attractive Dr. Taylor Whitman, to lure the perpetrator out of hiding—with Rose as the bait. What Rose fails to foresee is the complexity of the crime, involving more than one perpetrator tasked with silencing her. Will her cunning be enough to unravel the clues before it’s too late?


Step into Denver’s bustling city streets at the turn of the century with Rose McKenzie, a spirited private investigator and a woman brave enough to undertake any case.

Don’t miss The Case of the Peculiar Inheritance, a stand-alone novel in the delightfully entertaining McKenzie Sisters Mystery series.

The Case of the Copper King

Clever and feisty Cassandra McKenzie engages her newest assignment for the Pinkerton Agency with a knack for deception and a blade in her boot.

Smart, skilled, and unafraid to get her hands dirty, Cassandra grudgingly takes on a new assignment in one of Colorado’s busiest mining towns, where murder and theft draw her deep into a puzzle of lies, quarries, and forgery.

When the mysterious and handsome Quinn Morgan is enlisted to help solve the case, she reluctantly accepts his presence for an undercover scheme meant to draw out the crooks and retrieve the stolen money before they end up buried in a mountainside. Will their talents be enough to untangle truth from deceit before they run out of time?

Ride the rails to Durango at the turn of the century with Cassandra McKenzie, a woman cunning enough to solve the toughest cases in some of the Rockies most rugged and beautiful places.

Immerse yourself in The Case of the Copper King, a stand-alone novel in the delightfully entertaining McKenzie Sisters Mystery series.

Samantha St. Claire

Samantha St. Claire is the pen name of an author passionate about American history and the people whose legacies are woven into the fabric of a nation. She writes these characters to life in her novels of the western frontier, their trials and triumphs. Coming from a family of pioneers, she honestly claims her roots as a Daughter of the American Revolution and descendant of a Scottish Laird.

The road from college graduation led due west where teaching in a small Arizona town fulfilled childhood fantasies on multiple levels. Hiking and backpacking the canyons and desert fed her imagination with the landscapes she would use later in life as an author. Moving to California opened new vistas, but Idaho sparked her interest in the history of the magnificent central mountain ranges.

Never faint of heart, her signature protagonists face the hazards of the frontier with courage, wit, and a healthy pinch of humor. Visit her at

MK McClintock

Award-winning author MK McClintock writes historical romantic fiction about courageous and honorable men and strong women who appreciate chivalry, like those in her Montana Gallagher, British Agent, and Crooked Creek series. Her stories of adventure, romance, and mystery sweep across the American West to the Victorian British Isles, with places and times between and beyond. She enjoys a quiet life in the northern Rocky Mountains. 


MK invites you to join her on her writing journey at, where you can learn more about her many books and series, explore reader extras, subscribe to receive the latest news, and browse the blog. 

Book Details

Title: The Case of the Peculiar Inheritance

Author: Samantha St. Claire

Release Date: June 22, 2021

Publisher: Trappers Peak Publishing

Series: McKenzie Sisters Mystery Series (read in any order)

Content Rating: PG – clean/sweet romance with some action and content normal to cozy murder mysteries

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Book Details

Title: The Case of the Copper King

Author: MK McClintock

Release Date: June 22, 2021

Publisher: Trappers Peak Publishing

Series: McKenzie Sisters Mystery Series (read in any order)

Content Rating: PG – clean/sweet romance with some action and content normal to cozy murder mysteries

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