Murder Must Advertise is a Lord Peter Wimsey mystery novel by Dorothy L. Sayers, published in 1933. Most of the action takes place in an advertising agency, a setting with which Sayers was very familiar. One of her advertising colleagues, Bobby Bevan, was the inspiration for the character Mr Ingleby. Dorothy Leigh Sayers (1893 – 1957) was a renowned English crime writer, poet, playwright, essayist, translator and Christian humanist. She was also a student of classical and modern languages. She is best known for her mysteries, a series of novels and short stories set between the First and Second World Wars that feature English aristocrat and amateur sleuth Lord Peter Wimsey, that remain popular to this day. However, Sayers herself considered her translation of Dante’s Divine Comedy to be her best work. She is also known for her plays, literary criticism and essays.