Her books were very popular during the Great Depression and World War II. Her novels, which journalist Lesley McDowell described as containing "derring-do, dashing blades, and maids in peril", allowed readers to escape from the mundane and difficult elements of their lives. In a letter describing her novel "Friday's Child", Heyer commented, "'I think myself I ought to be shot for writing such nonsense. ... But it's unquestionably good escapist literature and I think I should rather like it if I were sitting in an air-raid shelter or recovering from flu."