In May 2014, the mountaineer and scientist John All fell into a crevasse near Everest and took a series of videos as he struggled to climb out 70 feet of ice and snow with fifteen broken bones - including 6 cracked vertebrae, internal bleeding, a severely dislocated shoulder, and his face covered in blood. The videos of him went viral and appeared in newscasts all over the world: CNN, BBC, Australia, Brazil, Israel, South Korea, Saudi Arabia, etc. and every website imaginable - from People Magazine to National Geographic. NPR called him "a badass for science." Yet this story is only the latest of All's adventures. He's also won a footrace for his life with a wild hyena, stepped on a black mamba in the African bush, and scaled Everest - all in pursuit of his true passion: the future of adaptation to our world's changing climate. Icefall is more than a fascinating adventure story-it is a report from the extremes, which hold new lessons about the impact of climate change. It is about the collapsing Andean glaciers, the hidden jungles in Honduras where native people have learned about surviving hurricanes, and the highest points on earth, where more scientific secrets lie. The result is a thrilling adventure memoir with profound lessons for how humans will adjust as our world continues to change beneath our feet.

The Yukon Quest International Sled Dog Race is one of the most challenging sporting events in the world. Every February, a handful of hardy souls spends over two weeks racing sleds pulled by fourteen dogs over 1,023 miles of frozen rivers, icy mountain passes, and spruce forests as big as entire states, facing temperatures that drop to forty degrees below zero on nights that are seventeen hours long.

Why would anyone want to enter this race? John Balzar-who moved to Alaska and lived on the trail-treats us to a vivid account of the grueling race itself, offering an insightful look at the men and women who have moved to this rugged and beautiful place. Readers will also be fascinated by Balzar's account of what goes into the training and care of the majestic dogs who pull the sleds and whose courage, strength, and devotion make them the true heroes of this story.