On an otherwise unremarkable Saturday in Tucson last month, I visited the intersection of the Harlem Renaissance and romance lit with Netflix darling Tia Williams, brushed up on global security threats with MSNBC contributors Barbara McQuade and Frank Figliuzzi, got an easy Roman-Jewish cake recipe from cookbook wunderkind Leah Koenig, and caught a dramatic reading by National Humanities Medal winner Abraham Verghese. All before lunch. And tens of thousands of people around me were doing much the same thing: making the rounds at the famed Tucson Festival of Books, where I’d decided to spend a few hours on a trip to see my parents. As I began to realize the more people I met in line, many had come to town just for this.