Twilight Sleepis a novel by American author Edith Wharton and was first published in 1927 as a serial in the Pictorial Review before being published as a novel in the same year. The story, filled with irony, is centered around a socialite family navigating the New York of the Jazz Age and their relationships. This novel landed at number one on the best-selling list just two months after its publication and finished the year at number 7. Even as a best selling novel Twilight Sleep was not well received by critics at the time, who, while appreciating Wharton as a writer, struggled with the scenarios and characters she had created in the novel. While it was not considered as such in its own time period, today Twilight Sleep is widely considered to be a modernist novel as it employs modernist literary devices, such as an ever changing narration among the novel's characters and a close examination of the characters' self-identities and relationships with one another.

Edith Wharton (January 24, 1862 – August 11, 1937) was an American writer and designer. Wharton drew upon her insider's knowledge of the upper-class New York "aristocracy" to portray realistically the lives and morals of the Gilded Age. In 1921, she became the first woman to win the Pulitzer Prize in Fiction, for her novel The Age of Innocence. She was inducted into the National Women's Hall of Fame in 1996. Among her other well known works are The House of Mirth, the novella Ethan Frome, and several notable ghost stories.