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Grizzly Narrows
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09 June 2026

When a personal vendetta leads to a savage prison escape, special agent Sam Rivers must outwit a deadly killer before his family becomes the next target.
Sam Rivers expects a quiet few days at a law enforcement conference, held at Peterson’s Resort, deep in the forests of northeastern Minnesota. Joined by his pregnant wife and teenage daughter, the special agent for the US Fish and Wildlife Service looks forward to a working vacation. But the wilderness offers no refuge when danger comes looking for him.
After violent offender Angus Moon escapes from a Canadian prison—with help from the mysterious Wilhelmina Gunn—the cunning duo set their sights on revenge against Sam, whom they blame for ruining their lives. The severed head of a grizzly bear appears on a remote bridge known as Grizzly Narrows, luring Sam into a deadly game with high stakes: the life of his abducted wife.
As Angus stalks the woods with calculated brutality, Sam must rely on his instincts, his daughter’s resourcefulness, and his wolfdog companion, Gray, to track a predator who knows the terrain—and Sam’s weaknesses—all too well.
In this sixth installment of the Sam Rivers Mystery series, award-winning author Cary J. Griffith delivers a pulse-pounding wilderness thriller packed with action, psychological tension, and emotional depth. Grizzly Narrows is a gripping tale of survival and vengeance where one wrong step could be Sam’s last.
“My heart beats a little faster whenever a new Sam Rivers mystery drops. Readers are guaranteed to learn something fascinating about Midwestern flora or fauna.”
—Jeffrey B. Burton, award-winning author of the Chicago K-9 Thrillers and the Mace Reid K-9 Mysteries
“Immersed in the authenticity of the wild North Country, Griffith carves a gripping story of rabid revenge.”
—Maren Cooper, author of Finding Grace
“Grizzly Narrows is a thrilling return to the world of Sam Rivers, with treachery around every corner. With unforgettable characters and a unique setting, it's a heart-pounding ride from start to finish."
—Nicole Maggi, author of the acclaimed National Park Mystery Series
—Glenn R. Miller, author of Doorman Wanted and Rough Cuts
Award-winning author Cary J. Griffith earned a B.A. in English from the University of Iowa and an M.A. in library science from the University of Minnesota. His books explore the natural world. In nonfiction, he covers the borderlands between civilization and wild places. In fiction, he focuses on the ways some people use flora and fauna to commit crimes, while others with more reverence and understanding of the natural world leverage their knowledge to bring criminals to justice. He lives with his family in a suburb of Minnesota’s Twin Cities.