Sheck Exley. 1994. 16 color, 55 b/w photos, 16 maps. Caverns Measureless to Man is the story of the passion of an extraordinary individual who spent his life exploring underwater caves. For nearly thirty years, Sheck Exley was the leader. He set records, he developed the techniques, and he maintained the highest standards of excellence. Sheck lived a life of adventure, danger, and excitement of a degree that few people can ever dream of; or, if they do, those dreams are nightmares. If you participate on the highest level, you know that some of your best friends are going to die. If you continue to push yourself and your equipment to the limits. If you persist in being a world class diver as Sheck was the chances are very high that you, too, will die. This book may terrify you, but it will unquestionably fascinate you, and in the end, Sheck Exley will convince you that his death came to him in the midst of the incredibly intense joy he took in diving into the depths of the earth.