In Grave Shadows, Bryce and Ashley Timberline's friend Jeff is dying, and his collection of autographed sports memorabilia has disappeared. While Bryce and Jeff attempt a 200-mile bike hike for cancer research, Ashley does a little research of her own. Can they track down the missing memorabilia before it's too late? Join the Timberline twins, the ATV-riding tweens from Colorado, as they unearth action-packed mystery and adventure wherever they go. Recommended for ages 8 to 12 years.