When he's not writing bestselling books like When You Are Engulfed in Flames and Let's Explore Diabetes with Owls, or reading essays on NPR, David Sedaris is walking alongside roads in England, picking up cans and candy bar wrappers and trash. Nobody asks him to do it, and nobody pays him--he's simply obsessed with picking up litter. In this interview, he explains how that obsession inspired the title of his next book, Theft By Finding. He also talks about the oddball inscriptions that