The Siren is an erotic romance novel by Tiffany Reisz. It follows the story of Nora Sutherlin, a successful erotica writer, and her complicated relationship with Søren, a Catholic priest with a dark and dominant side. The book explores themes of love, desire, and the boundaries of sexual exploration. The Siren is known for its explicit and provocative content, as well as its complex and well-developed characters.