The Sam Rivers Mysteries: A 5-Book Collection: Wildlife-Themed Thrillers Set in the Great Outdoors

The collection includes:

• Wolf Kill—A bizarre livestock attack draws Sam into an investigation involving the mysterious death of his estranged father.
• Cougar Claw—When a wealthy businessman is reportedly killed by a cougar, Sam questions the evidence behind the impossible attack.
• Killing Monarchs—A school custodian’s suspicious death leads Sam and his wolfdog, Gray, toward a murderous conspiracy.
• Dead Catch—Murder and a multimillion-dollar poaching operation reconnect Sam with a troubled childhood friend.
• Rattlesnake Bluff—The appearance of an endangered snake exposes evidence of a decades-old crime and a deadly cover-up.

Sam Rivers understands predators. As a wildlife biologist and special agent for the US Fish and Wildlife Service, he has built a career studying animal behavior and protecting natural resources. But the most dangerous predators he encounters are often human.

Follow Sam across Minnesota’s frozen forests, sprawling lake country, and rugged blufflands—and into investigations whose consequences reach far beyond the state. Along the way, Sam investigates suspicious animal attacks, unexplained deaths, poaching networks, endangered species, and secrets that powerful people will kill to protect.

At Sam’s side is Gray, his highly trained wolfdog companion, whose instincts and extraordinary nose repeatedly uncover evidence that others overlook. Together, they pursue the truth even when local authorities doubt them—and even when the investigations place them directly in a killer’s path.

Written by award-winning natural history author Cary J. Griffith, this series blends authentic wildlife knowledge with atmospheric settings, complex mysteries, and page-turning suspense. Perfect for readers of outdoor thrillers, regional mysteries, wildlife crime, and conservation-themed fiction, The Sam Rivers Mysteries follows a determined investigator who knows that not every predator walks on four legs.