Assassination Classroom: Korotan

The Korotan books are a series of four educational Assassination Classroom themed English vocabulary books which also include light novel sections with illustrations by Yūsei Matsui. The educational material is supervised by Abe Koudai, while the light novel sections are written by Kuma Atarou, while also overseen by Yūsei Matsui.

The light novel in Korotan D is the only one to be officially noted as canon by Yūsei Matsui.