epitext means textual material which surrounds a work but is not part of the text or its peritext, including published interviews, private correspondence, diary entries and the like. Lexicurio rates it Sui generis — a strength score of 85 out of 100.
Etymology
By surface analysis, epi- + text.
noun
- Textual material which surrounds a work but is not part of the text or its peritext, including published interviews, private correspondence, diary entries and the like.“It is the second category which I christen, for want of a better word, epitext and which will be the subject of the last two chapters.”