"O" Is for Outlaw is the 15th novel in Sue Grafton's "Alphabet" series of mystery novels and features Kinsey Millhone, a private eye based in Santa Teresa, California. The novel's plot has its roots in the Vietnam War, and features information about Kinsey's previously unnamed first husband, Mickey, and their brief marriage 14 years before. There is no interaction between them in the story because Mickey is in a coma throughout the novel's action.