The "Twilight Series" is a popular collection of four novels written by Stephenie Meyer. The story follows the life of a teenage girl named Bella Swan who moves to the small town of Forks, Washington, where she falls in love with a mysterious vampire named Edward Cullen. The series explores themes of love, sacrifice, and the supernatural. The books include "Twilight," "New Moon," "Eclipse," and "Breaking Dawn." The series gained immense popularity, leading to a successful film adaptation that further expanded its fan base. The "Twilight Series" has had a significant impact on young adult literature and the vampire genre.