We hear a lot about the many things that are disrupting the American workplace: the decline of manufacturing, demographics, globalization, automation and, especially, technology. And it’s true — all of those are roiling the world of work, not just in America but worldwide.But there’s another force transforming the way we work, and that is: nonwork. Or, more specifically, what we’re doing in those few hours when we’re not working. With “Rest: Why You Get More Done When You Work Less,” Alex Soojung-Kim Pang superbly illuminates this phenomenon and helps push it along.