Eric Shipton and Bill Tilman, two of the most intrepid and celebrated mountain explorers ever, are no strangers to  mountaineers and people who love the Himalayas. But Jim Perrin&rsquos masterful new biography of these two men &mdash partners, friends and irreverent dreamers &mdash and their amazing run together, hits new highs of literary excellence. Set in the decade leading up to World War II&mdashthe &lsquogreat decade&rsquo of the title &mdash the book is as much an account of the times when mountain exploration had reached its peak as a story of the pivotal role played by these two. Shipton and Tilman were the first to place the sport of mountaineering in a larger context - the urge to see the physical world in its beauty and ferocity, without a screen of &lsquocivilisation&rsquo insulating them.