Murder Must Advertise was published in 1933 and is one of the most distinctive Lord Peter novels because of its workplace setting. Lord Peter goes undercover at Pym’s Publicity, a London advertising agency modeled directly on Benson’s, the firm where Sayers herself had worked for nine years as a copywriter. He assumes the identity of Death Bredon, a junior copywriter, after a previous copywriter named Victor Dean has died by falling down the office stairs in what looks like an accident.
The novel is partly a satire of the early advertising industry, and Sayers’s lived experience of it provides much of the book’s specific texture: the office politics, the absurd account meetings, the petty rivalries between copywriters, the brilliant slogans being produced for products nobody actually needs. The underlying murder plot turns out to involve a drug-smuggling ring using advertising copy to send coded messages to dealers. The book is unusually socially engaged for the series and shows Sayers at her most observationally precise. A strong middle-period entry that works as a standalone.