Johann is a close friend, so let’s get that out of the way. His latest subject is the modern curse of screen-driven distraction, and how to combat it: “Stolen Focus: Why You Can’t Pay Attention — And How To Think Deeply Again.” I even appear in the background in his account of how he tried to escape Internet addiction one summer in Provincetown. So excuse some of the informality and jokiness at the beginning of this chin-wag.