I couldn't help but think of Nicholson Baker's first novel [0].
> The Mezzanine tells this story through the extensive use of footnotes—some of them comprising the bulk of the page—as the narrator travels through his own mind and past. The footnotes are quite detailed and sometimes diverge into multiple levels of abstraction. Near the end of the book, there is a multi-page footnote on the subject of footnotes themselves.
> The Mezzanine tells this story through the extensive use of footnotes—some of them comprising the bulk of the page—as the narrator travels through his own mind and past. The footnotes are quite detailed and sometimes diverge into multiple levels of abstraction. Near the end of the book, there is a multi-page footnote on the subject of footnotes themselves.
[0] https://en.wikipedia.org/wiki/The_Mezzanine