Garrison Keillor spent 42 years as the host of “A Prairie Home Companion, a folksy show that was performed live on Saturday nights and broadcast on hundreds of public radio stations. Keillor, who likes to wear red sneakers, brought his audience news from Lake Wobegon, a fictional town in the state of Minnesota where he grew up. He also performed in skits where he played Guy Noir, Private Eye. Keillor likes to sing patriotic songs and recite poetry. He’s also written more than 15 books and many articles for the New Yorker and the Atlantic. Keillor is currently at work on a novel which he says he better finish fast. “I’m 82. I don’t have time to write Moby Dick.” We talk about why he likes being old, his fellow Minnesotan Tim Walz and the joys of living on the Upper West Side of Manhattan.