Witches don’t ride on brooms when it’s raining. They ride on mops. Any child who’s read “Trick-Or-Treat: A Happy Haunter’s Halloween” knows that.

The Scariest Poem I Know. César Vallejo’s “Piedra Negra Sobre Una Piedra Blanca,” or “Black Stone on a White Stone,” isn’t what you might think of as a traditional Halloween poem.