Krakauer retraces the steps of Chris McCandless, a young man who walked into the Alaskan wilderness and never walked out again. The author speaks to people who took McCandless in and drove him to Alaska and around the west. He also discusses other adventurers who never returned to society and goes over the possible reasons why McCandless perished. To be frank, the book creeped me out, so I would not recommend reading it before bed unless you want to think of dead bodies in sleeping bags.
This was a book for my Couples Book Club-PDX Meetup group.