Maureen Corrigan interviews writer Richard Stevenson. That's a pseudonym for Richard Lipez ("LIP-ehz"). He works in the genre of gay detective mysteries. Since 1981, he's written a series of six books about detective Donald Strachey ("STRAY-chee"). He is also a Washington Post columnist under his real name. Stevenson's latest book is called "Strachey's Folly: A Donald Strachey Mystery." (St. Martin's Press)