Isekai Cheat Magician is a fantasy-action light novel written by Takeru Uchida and illustrated by Nardack. Shufunotomo (using Hero Bunko imprints) have published eight volumes of the novel since June 28th, 2013. The light novel is the source material of the series. It has currently been adapted into 5 manga volumes and will have an anime adaptation in July 2019.
As of Volume 8, the sales with them manga have reached 850,000 copies in print.