| Answer | Crossword Clue |
|---|---|
| ERA | History book discussion, perhaps |
| ERA | History book discussion |
| ERA | History-book chapter, perhaps |
| ERA | History book chapter, perhaps |
| ERAS | Chapters in a history book, perhaps |
| excursus | A detailed discussion of a particular point in a book, usually in an appendix |
| excursuses | A detailed discussion of a particular point in a book, usually in an appendix |
| on | ed as a function word to indicate the subject of study, discussion, or consideration a book on insects reflect on that a moment agree on price |
