Who are the best climbers in the world? In Katie's book Vertical World, she interviews nine climbers who have made significant contributions to the sport. “These contributions will stand the test of time,” she says. Her intent—besides inaugurating a career as an author—is to portray the leading activists of the new generation. She’s chosen three women and six men who represent America’s current cutting edge of bouldering, sport, trad, big wall free, and alpine rock climbing.

So what do you think?