Professor B. J. Rahn teaches English Literature at Hunter College in New York. She has been teaching, researching, and writing about crime fiction for over two decades. She has published articles in journals and reference books such as The Armchair Detective, The Dictionary of Literary Biography and the Oxford Companion to Crime and Mystery Writing. She also leads detective walking tours in the UK, which visit sites in the lives and fiction of authors such as Arthur Conan Doyle, Dorothy L. Sayers, Agatha Christie, and Margery Allingham.