Murder at the ABA (1976) is a mystery novel by Isaac Asimov, following the adventures of a writer and amateur detective named Darius Just (whom Asimov modeled on his friend Harlan Ellison). While attending a convention of the American Booksellers Association, Just discovers the dead body of a friend and protégé. Convinced that the death was due to murder, but unable to convince law enforcement, Just decides to investigate on his own.