A bank of clouds was assembling on the not-so-distant horizon but journalist/mountaineer Jon Krakauer, standing on the summit of Mount Everest, saw nothing that "suggested that a murderous storm was bearing down." He was wrong. The storm, which claimed five lives and left countless more--including Krakauer's--in guilt-ridden disarray, would also provide the impetus for Into Thin Air, Krakauer's…