Grimoire of Zero (Japanese: ゼロから始める魔法の書, Hepburn: Zero kara Hajimeru Mahō no Sho, lit.

"Starting the Magical Book from Zero") is a Japanese light novel series written by Kakeru Kobashiri and illustrated by Yoshinori Shizuma.

A half-man, half-beast mercenary, his kind scorned by the populace, dreams day and night of becoming a human.

She offers to turn him human if he will escort her as her guard on her search for a magical tome, one that possessed powerful knowledge which could wreak havoc in the wrong hands.

[7] ASCII Media Works published the series in eleven volumes under its Dengeki Bunko imprint from February 8, 2014 to December 9, 2017.

[7] Yasutake launched a spin-off manga, titled Zero Kara Hajimeru Mahō no Sho nano!