Secret Codes - Lost Landmarks - Hidden Clues - Real Locations! 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. Through twists and turns, the mystery unfolds while Jake,...