Today's episode is all about professional longevity. First, actor Steve Martin and New Yorker cartoonist Harry Bliss sit down with NPR's Mary Louise Kelly to explain their new comic memoir, Number One Is Walking, focused on anecdotes from Martin's life in Hollywood. Then, NPR's Elissa Nadworny asks author Nick Hornby about his new book, Dickens and Prince, which finds similarities in how the literary and musical figures both managed to pump out an impressive amount of material throughout their careers.