The Kurt Diemberger Omnibus: Summits and Secrets : The Endless Knot : Spirits of the AirOne of the world's most influential climbers, Kurt Diemberger is the only living person to have the distinction of two first ascents on the world's 8000 meter peaks, both climbed without supplemental oxygen. In each of these classic works, his infectious mixture of joy, awe, and a voracious appetite for life shine through his words. The inclusion of two fascinating autobiographical works Summits & Secrets and Spirits of the Air plus a powerful