Rachel Howthorne is an American author known for her work in young adult fiction. She has written several popular series, including the Dark Guardian series, which blends elements of romance and fantasy. Her stories often feature strong characters and themes of love, friendship, and self-discovery. In addition to her novels, Howthorne has also published under the pen name Rachel Caine, where she has gained recognition for her contributions to the urban fantasy genre. Her writing has garnered a dedicated fan base, and she continues to be an influential figure in contemporary young adult literature.