A companion volume to the new IMAX film offers a sumptuously illustrated, close-up look at the world's great cave environments, capturing the wonders and perils of caving and describing the unique characteristics of these underground habitats. 25,000 first printing.

Recounts pioneering expeditions into submerged prehistoric caves in Europe, as well as record-setting penetrations of freshwater springs and underground rivers in Florida and Mexico

Caverns Measureless to Man is the story of the passion of an extraordinary individual who spent his life exploring underwater caves. For nearly 30 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 limitsif you persist in being a world class diver as Sheck wasthe 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. The boxed, limited edition is printed on special paper and is numbered 1-100. Sheck was going to autograph each copy and the profits were (and still are) to be his personal contribution to the Hamilton Valley Project of the Cave Research Foundation. Alas, Sheck died four days before copies of the book were available, and he never saw it. His contribution to CRF will still be made, however, as book collectors and admirers of Sheck Exley will soon buy up this limited edition.