The palm-sweating terrifying memoir of the world's greatest free solo climber, Alex Honnold.

Alex Honnold is perhaps the world's best 'free-solo' climber, scaling impossible rock faces without ropes, pitons or support of any kind. There is a purity to Alex's climbs that is easy to comprehend, but impossible to fathom; in the last forty years, only a handful of climbers have pushed 'free soloing' to the razor-edge of risk. Half of them are dead.

From Yosemite's famous Half Dome to the frighteningly difficult El Sendero Luminoso in Mexico, Alone on the Wall is structured around Alex's seven most extraordinary climbing achievements so far. These are tales to make your palms sweat and your feet curl from vertigo. We get to the heart of how - and why - Alex does what he does. Exciting, uplifting and truly awe-inspiring, Alone on the Wall is about the essential truths of risk and reward, and the ability to maintain a singular focus, even in the face of extreme danger.

Honnold has free-soloed the longest, most challenging climbs ever. Most peculiar of all, even to elite rock climbers, Honnold does this without apparent fear, as if falling were not possible.