罪惡王冠
A side story novel titled "Guilty Crown: Princess of Deadpool" was written by Gan Sunaaku from Nitroplus, with illustrations done by a Production I.G and Nitroplus collaboration. A special version that came along with a special book cover was first sold at Anime Contents Expo 2012 in between March 31 and April 1, while the official release was on April 25. The first chapter was put up for public reading.