In the ninth book in Graham's National Park Mystery Series, an archeologist must stop a century-old crime to save his daughter.

"Death Valley Duel is a taut, smart, and propulsive thriller that will keep you spellbound. Scott Graham has written a love letter to the California desert, and to parenthood, and to the athletes who push themselves past limits most of us cannot even imagine. This novel is a steady, dangerous, and addictive race toward justice." —NINA DE GRAMONT, New York Times bestselling author

When archaeologist Chuck Bender makes a stunning discovery of a century-old crime, he believes it may be related to a series of deadly accidents plaguing the Whitney to Death 150, the world's toughest ultra trail-running race. While Chuck's teenage stepdaughter Carmelita races to win the competition, Chuck races to uncover the wicked intent lying behind the tragedies—before Carmelita becomes the next victim.