Gun Princess (銃姫, Jū Hime) is an ongoing Japanese light novel series written Madoka Takadono and illustrated by Katsumi Enami. The first novel was published under Media Factory's MF Bunko J imprint in April 2004, and as of December 2009, eleven novels have been released. The series is set in a world where humans have discovered a way to seal their long-lost magical powers into bullets, starting an era of constant warfare.