“K2 is a savage mountain that tries to kill you.” That is how climber George Bell described the infamous peak after the first American expedition in 1953–forever giving the mountain its nickname–The Savage Mountain. Sixty-six years later, Eddie Bauer mountain guides Adrian Ballinger and Carla Perez aim to summit the 8611-meter peak and join a community of explorers fewer in number than those who have been to outer space. Even more incredible, they both will attempt the feat without the use of supplemental oxygen. Every step of the way the team faces hazardous conditions, terrifying setbacks, and crushing misfortunes. But as Ballinger puts it, “I’ll go until the mountain tells me I can’t go anymore.”