<p>'How much risk is worth taking for so beautiful a prize?'<br>The Magician's Glass by award-winning writer Ed Douglas is a collection of eight recent essays on some of the biggest stories and best-known personalities in the world of climbing.<br>In the title essay, he writes about failure on Annapurna III in 1981, one of the boldest attempts in Himalayan mountaineering on one of the most beautiful lines ? a line that remains unclimbed to this d...