Meg Wolitzer presents two stories about secret spaces and what they represent. In N. K. Jemisin’s speculative fantasy “Elevator Dancer,” a security guard in a totalitarian regime is beguiled by an act of freedom. The reader is Laura Gómez. And Hugh Dancy reads Greg Jackson’s “The Hollow,” about a secret room, a purposeless life, and a guy who can’t stop talking about Vincent Van Gogh.