Natsuo Kirino, born in 1951, is the author of sixteen novels, four short-story collections, and an essay collection. She is the recipient of six of Japan's premier literary awards, including the Mystery Writers of Japan Award for Out, and the Izumi Kyoka Prize for Literature for Grotesque. Her work has been translated into nineteen languages, and several of her books have been turned into movies. Out was the first of her novels to appear in English and was nominated for an Edgar Award. She lives in Tokyo.