St. Elmo is a novel by American author Augusta Jane Evans published in 1866. Featuring the sexual tension between the protagonist St. Elmo, a cynical man, and the heroine Edna Earl, a beautiful and devout girl, the novel was about the agency of women who could save men from apostasy. The novel became one of the most popular novels of the 19th century. The novel sold a million copies within four months of its publication.

Augusta Jane Wilson, was an American author of Southern literature and a supporter of the Confederacy during the American Civil War. Her books were banned by the American Library Association in 1881. She was the first woman to earn US$100,000 through her writing.