Leidy Klotz, Subtract: The Untapped Science of Less (Flatiron Books, 2021) It’s Monday morning and the battalion is formed at the motor pool. The battalion commander steps forward and rallies motivation for this week’s training events: a Tuesday airborne jump, a Wednesday squad march-and-shoot competition, and a Thursday live-fire rehearsal. By Friday, pending all training requirements complete, a half-day of equipment maintenance and everyone should be home by 1500. Sounds like a plan.