Which seforim in navi are not in any of the Haftarot?
We read Haftarot from all the 8 Nevi'im scrolls, at various times during the year. See Wikipedia for a list.
Three of the 12 minor prophets - תְּרֵי עֲשַׂר - are not included in any Haftarah.
- Nachum - נחום
- Zefania - צפניה
- Chagai - חגי