D&D 5E With Fizban's and now Bigby's, what other groups do you think we'll see with their own books?

[Demetrios1453]

Back in 3E it was
Draconomicon - dragons
Libre Mortis - undead
Lords of Madness - aberrations
Fiendish Codex I: Hordes of the Abyss - demons
Fiendish Codex II: Tyrants of the Nine Hells - devils
Drow of the Underdark - drow

I could see all these back in 5E, though Drow would probably now be a subsection of Feywild/Elf book.

Both volumes of the Fiendish Codex were excellent. At the time I was hoping for a volume 3 on yugoloths (and perhaps other miscellaneous fiends), but, alas, it never happened. They doubled as sourcebooks for the Nine Hells and the Abyss as well. I doubt they would be split in 5e, but a fiend book would be nice, and reasonable likelihood.

 

[CleverNickName]

Personally, I'd love to see a book dedicated to lycanthropes and shifters.

 

[LuisCarlos17f]

A book about werebeasts is totally possible, but too linked to Ravenloft.

 

[Cadence]

Boo's Bestiary - a nature guide to animals from mythology, legend, and folk-lore.

 

[Paul Farquhar]

Secret Organizations (Harpers, Red Wizards, Illuminati)

This is an interesting one, since Call of the Netherdeep (which I'm currently running) does this. It has stat blocks for members of three organisations, each with three tiers.