Overlord is a popular Japanese light novel series authored by Kugane Maruyama. It started online serialization in 2010, and Enterbrain has published sixteen volumes since July 2012. A manga adaptation began in 2014, with Satoshi Ōshio as the writer and Hugin Miyama as the artist. The series has also been adapted into an anime by Madhouse, which has four seasons to its name. In addition to the seasons, two compilation films summarizing the first season have been released. A forthcoming anime film has been announced.