This scholarly monograph traces the evolution and reinterpretation of the Lilith myth across French literary traditions from Romanticism through the Decadent movement. Drawing on extensive textual analysis, the work examines how Lilith—a figure rooted in ancient Semitic mythology—was transformed, reimagined, and repurposed by writers navigating shifting cultural, philosophical, and aesthetic currents in 19th- and early 20th-century France. The study situates Lilith within broader discourses on gender, desire, and the supernatural, revealing her enduring power as a symbol of transgression, femininity, and metamorphosis. By mapping the avatars and metamorphosis of this mythic figure, the book offers a nuanced contribution to the fields of comparative literature, myth studies, and French cultural history.