A Plummet to Soar Story Feckless, luckless, and charming, Mackenzie Detweiller is the author of a self-help book one reviewer calls “the most misbegotten motivational tool since Mein Kampf.” He’s maneuvered himself into a career as a life coach, but more often than not, his advice is bad. Really bad. It’s even getting people hurt… and […]