Kristin Cast is an American author best known for co-writing the popular young adult series, House of Night, with her mother, P.C. Cast. The series, which features themes of vampires and coming-of-age, has gained a significant following since its debut in 2007. In addition to the House of Night series, Kristin has also written other works, including standalone novels and collaborations. She is known for her engaging writing style and ability to connect with young readers, making her a prominent figure in the young adult fiction genre.