Secret Codes - Lost Landmarks - Hidden Clues - Real Locations: ---- Join Jake Evans and his two friends on a thrilling scavenger hunt through some of America's most rugged and beautiful national parks. This collection of books one through three takes readers into secret places in Rocky Mountain, Great Sand Dunes, and Grand Canyon National Parks. The quest is full of twists and turns, survival skills, humor, and a parallel story set in the late 1800's....