Any good interview, even one that’s entirely friendly on the surface, should have a slight adversarial quality, since the reporter and the subject have inherently different goals. The Coens don’t always suffer fools gladly, but they give good copy, even in one-word answers to questions that don’t interest them. (“Do you get excited about the Cannes competition?” one reporter asked them. “Does that get your heart pumping?” Ethan Coen: “No.”) Over the years the Coens have developed a routine that lies somewhere between practiced shtick and a psychological coping mechanism. Ethan, the younger, shorter, lighter-haired brother, delivers brief responses, often glib or acrid in tone, and then the taller, older and more loquacious Joel bails him out, expounding generously on the original question or diverting it into friendlier terrain. [. . .] Well, I feel like one aspect of that is that your movies almost always reward a second viewing. There’s always stuff I didn’t see o...