THE REGULATOR BOOKSHOP–Don’t let the name of this book fool you into assuming this is another set of well-meaning narratives about the Argentine-born Cuban revolutionary. Rather, Ben Fountain’s collection of short stories, Brief Encounters with Che Guevara, pits tourists in conflicting situations in Central America, locked in personal conundrums surrounded by social and political upheaval. A social aid worker becomes a diamond smuggler, and an ornithologist respects the supposedly political intentions of his kidnappers. Fountain reads for free at 7 p.m.