Grimgar of Fantasy and Ash (灰と幻想のグリムガル, Hai to Gensō no Gurimugaru) is a light novel series written by Ao Jūmonji with illustrations by Eiri Shirai. OVERLAP published the first novel on June 25, 2013 under their Overlap Bunko imprint, and eight volumes have been released as of March 25, 2016. A manga adaptation by Okubashi Mutsumi began serialization in Square Enix's magazine Gangan Joker in April 22, 2015. An anime adaptation of the series was also announced and premiered on January 11, 2016.
The new digital publishing company J-Novel Club acquired the rights for the series' release in English. Not long after, a collaboration with Seven Seas Entertainment allowed for its publication of print editions.