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Ultramarathons don't leave much room for mistakes. Don't learn the hard way: Get a jump on training for an ultramarathon with Hal Koerner's Field Guide to Ultrarunning, a comprehensive handbook to running 30 to 100 miles and beyond, authored by one of the most experienced and recognized athletes in the sport.

First and foremost a book about running, The Longest Race takes listeners alongside ultramarathoner Ed Ayres as he prepares for, runs, and finishes the JFK 50-mile race at a then record-breaking time for his age division - 60 and older. But for Ayres, this race was about more than just running, and the book also encompasses his musings and epiphanies along the way about possibilities for human achievement and the creation of a sustainable civilization.

In the early hours of February 25, 1968, a Russian submarine armed with three nuclear ballistic missiles set sail from its base in Siberia on a routine combat patrol to Hawaii. Then it vanished. As the Soviet navy searched in vain for the lost vessel, a small, highly classified American operation using sophisticated deep-sea spy equipment found it - wrecked on the sea floor at a depth of 16,800 feet, far beyond the capabilities of any salvage that existed.