River of Gold — Donald Willerton

Two teens, one huge monk, and a stash of stolen gold -- that's all that stand in the way of a powerful corporation getting its hands on a peaceful river valley in rural New Mexico. Mogi Franklin and his sister, Jennifer, uncover clues to a century-old mystery, but unraveling a botched robbery isn't enough when a whole river, and a way of life, are at stake. Can fourteen-year-old Mogi expose the truth -- and save the valley before it's too late?