Her detective stories, which, according to critic Earl F. Bargainnier, "specialize in upper-class family murders", were known primarily for their comedy, melodrama, and romance. The comedy derived not from the action but from the personalities and dialogue of the characters. In most of these novels, all set in the time they were written, the focus relied primarily on the hero, with a lesser role for the heroine. Her early mystery novels often featured athletic heroes; once Heyer's husband began pursuing his lifelong dream of becoming a barrister, the novels began to feature solicitors and barristers in lead roles.