“Heart-stopping and relentlessly gripping. Tabor takes us on an odyssey into unfathomable worlds beneath us, and into the hearts of rare explorers who will do

"Former Navy rescue swimmer Brian Dickinson was roughly 1,000 feet from the summit of Mount Everest ... when his Sherpa became ill and had to turn back, leaving

Park ranger Anna Pigeon is enjoying the open spaces of Colorado when she receives an urgent call. A young woman has been injured while exploring a cave in New M

The Huautla in Mexico is the deepest cave in the Western Hemisphere, possibly the world. Shafts reach skyscraper-depths, caverns are stadium-sized, and sudden f

The incredible bestselling book from the author of No Barriers and The Adversity Advantage Erik Weihenmayer was born with retinoscheses, a degenerative eye diso