The "Raven Cycle" is a series of four young adult fantasy novels written by Maggie Stiefvater. The story follows Blue Sargent, a girl from a family of psychics, as she becomes involved with a group of boys from the nearby Aglionby Academy, particularly Gansey, who is searching for a legendary Welsh king. The series explores themes of friendship, love, and the supernatural, intertwining the lives of its characters with the mystical elements of Henrietta, Virginia. The books are known for their lyrical prose and complex character development, making them popular among readers of fantasy literature.