In addition to the aforementioned metadata fields, I also find essential:
- Original publication date
- Linked to Goodreads? Y/N
- I own paired audiobook? Y/N
- I own tangible book? Y/N
- DRM? Intact/No/Stripped
- Public domain? Y/N
- Series*
- Series number*
- 2nd series*
- 2nd series number*
- My series*
- My series number*
*Some books belong to multiple series; if so, I capture that. Additionally, I categorize some books in my own series (e.g., University_Course-title_Course-name_YYYY-startmonth-endmonth)