Fujimi Shobo
"Kore wa Zombie Desu ka?" began as a light novel series written by Shinichi Kimura, with illustrations provided by Kobuichi and Muririn. The first volume was published by Fujimi Shobo on January 20, 2009, with a total of 19 volumes published as of June 20, 2015 under their Fujimi Fantasia Bunko imprint.