Guest Blog by Kim McMahill: Series Fiction

I would like to thank Bonnie for hosting me once again on her blog. I last visited her blog in June of 2019 and discussed the third installment in the Risky Research Series, A Foundation of Fear, as well as when a writer should end a series. The best part of series fiction is that it gives the reader the opportunity to really get to know the characters on a personal level, to see the recurring protagonists and antagonists progress emotionally, evolving into better or worse people, and sometimes we even see them grow old. And, eventually all series must come to an end.

In the fourth installment of the series, A Measure of Madness, which released on April 9, 2021, FBI agent Devyn Nash’s pursuit of a deadly organization heats up, and the action takes us south of the border…way south! In this novel Coterie, a deadly organization that has been manipulating the diet and nutrition industries, starts to unravel exposing the truth behind the organization’s inception and the commitment level of its remaining members, leaving some questioning if they’ve gone too far.

Since my last visit, I do have a better idea on when this series should end. I am currently working on the fifth, and likely final installment of the series, A Recipe for Revenge. But for now, here’s a bit more on the latest novel, A Measure of Madness.


After a Washington, D.C. fundraiser exposes members of Coterie, a deadly organization that has been manipulating the diet and nutrition industries, the pursuit by FBI agent Devyn Nash rachets up. The FBI locates the mastermind behind Coterie in Puerto Rico, but despite help from local agents, their attempt to bring him in results in a shootout that sends Coterie’s members scrambling for cover, Devyn’s partner fighting for his life, and Devyn more determined than ever to bring them to justice. Her decision to pursue the head of Coterie to Brazil puts her job and her relationship with Wyoming Sheriff, Gage Harris, in jeopardy, but she is unwilling to allow those responsible for so much death to live out their lives in paradise.


There was nothing she wanted more at the moment than to go home and to hear Gage’s voice. At least one of those she could remedy immediately. She retrieved her cell and selected the first contact in her list.

“Hey cowboy, how are you doing?”

“Devyn, where are you? Are you all right?” When he was worried and anxious for information, he always jumped right to the point. It felt good to have someone who cared enough to really worry.

“I’m about forty miles from São Paulo. Gordo has made arrangements to fly me out of Brazil and into Uruguay on a private plane, and I’ll fly home commercial from there.”

“Thank goodness you’re on your way home. How about the second part to my question?”

“Do you want the truth or the candy-coated version.”

“I’m a big boy; lay it on me.”

Other Books in the Series

A Dose of Danger (book #1)

A Taste of Tragedy (book #2)

A Foundation of Fear (book #3)

A Measure of Madness (book #4)

A Formidable Foe (perma-free prequel novelette)

Midnight in Montana (perma-free micro-read)

To learn more about the Risky Research Series or to Download your copy of any of Kim’s novels, visit:


Barnes and Noble:


About the Author

Kim McMahill grew up in Wyoming which is where she developed her sense of adventure and love of the outdoors. She started out writing non-fiction, but her passion for exotic world travel, outrageous adventures, stories of survival, and happily-ever-after endings soon drew her into a world of romantic suspense and adventure fiction. Along with writing novels Kim has also published over eighty travel and geographic articles, and contributed to a travel story anthology. She has had the opportunity to live in Hawaii, New Mexico, South Dakota, Iowa, and Colorado, but has finally returned home to Wyoming. When not writing she enjoys gardening, traveling, hiking, puzzles, playing games, and spending time with family.

You can find Kim at any of the following:



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