I shared a booth with three other writers at the Tucson Festival of Books recently—an enormous and idiosyncratic celebration each year on the campus of the University of Arizona right in the heart of town. Between the four of us, we just about represented the main issues in life. There was Mary Paganelli, author of The Food Lover’s Guide to Tucson, and Terry Sterling, a heavy-hitter journalist and author of Illegal: Life and Death in Arizona’s Immigration War Zone. Sam Lowe’s