Murder at the ABA is a mystery novel by American writer 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 the police, Just decides to investigate on his own.