We need a story about a boy who was rejected as weak by his family and school, but was really SSS-ranked in English and defeated the Demon Lord and his Millennial Army.
I think the akahon Negishi is talking about is not the Edo-period one. That word is used to refer to several kinds of books that usually have red covers, chiefly:
Edo period storybooks (obsolete)
Pulp fiction (i.e. cheap novels)
University entrance workbooks (especifically those from Kodansha)
the Michelin Guide
I'm pretty sure she's referring to the third kind, but it could be the second kind trying to pass it off as the third.