Sci-fi movies? I like the aliens, the exotic scenery and the spaceships, from "Metropolis" and "The Day the Earth Stood Still" on through "Planet of the Apes" and "The Martian." Which is why, when Sloan de Forest’s new book, "Must-See Sci-Fi: 50 Movies That Are Out of This World," landed on my desk, I knew I wanted to talk to her about it.