Having leisurely picked it up one day without expecting to be taken in, Jon Krakauer’s Into Thin Air arrested me from the first page. “Among my five teammates who reached the top [of Mount Everest], four … perished in a rogue storm,” Krakauer writes. “By the time I’d descended to Base Camp nine climbers from four expeditions were dead, and three more lives would be lost before the month was out.” Twelve deaths seemed to me a Shakespearean number…