Mount Everest got a break from human footsteps and media attention last spring as a result of the coronavirus pandemic, but this month another climbing season is getting into full swing. While the peak has been climbed more than 10,000 times now, the closest most of us will ever come to touching its slopes is through words on a page. If you’re among that crowd of armchair mountaineers, get ready to devour these new books about Everest’s most distinctive historical moments, from George Mallory’s ill-fated ascent in 1924 to the summit traffic jam of 2019. ‘The Third Pole,’ by Mar...