Before Jake’s grandfather died, he was on the trail of a centuries-old mystery. And he has entrusted that mystery to Jake, leaving behind a set of hidden codes, riddles, maps, and other clues that lead Jake and his friends on a scavenger hunt into the heart of Colorado’s wild and rugged Rocky Mountain National Park.

As a Fish and Wildlife police officer, Luke McCain and his partner - a yellow Lab named Jack - spend their days patrolling the rivers, lakes, and forests of the wild and scenic Cascade Mountains in Eastern Washington. After hunters discover human remains inside a bear's stomach, McCain is thrust into the investigation. As more dead women are found in McCain's region, authorities suspect a serial killer is prowling the mountains he knows best. McCain will need his knowledge as an outdoorsman, and his instincts as an investigator, to track the psychopathic predator.

When a young girl is found dead in the mountains outside Timber Creek, lifelong resident Officer Mattie Cobb and her partner, K-9 police dog Robo, are assigned to the case that has rocked the small Colorado town. With the help of Cole Walker, a local veterinarian and single father, Mattie and Robo must track down the truth before it claims another victim. But the more Mattie investigates, the more she realizes how many secrets her town holds. And the key may be Cole's daughter, who knows more than she's saying.

Witnessing a bar scuffle was not what Navajo paralegal Naomi Manymules expected, but the chaos in Sage Landing was just getting started. A famous Hollywood producer has brought in truckloads of outsiders to make his next blockbuster. As if her movie-dazzled kids and her criminal dog aren’t problems enough, Naomi worries that her boss, attorney Grant Carson, won’t take on enough legal work to keep the office going.

Once a land of Pueblo dwellers, the town of San Geronimo Peak, New Mexico, is prime ski country. PI Howard Moon Deer and ex-cop Jack Wilder are headed there to meet their first client - a former US senator and the ski slope's owner. Instead, they find his body - and a murder case to solve.