I'm working on a dwarf book. Working title is The Rock Hardy Book of Dwarfs, but that might change. My concept is to make this a black and white PDF and POD 48 pager. It is possibly the first in a series of setting books that very crudely describe my "traditional" fantasy setting of Yria. Basically most of what you find in the pages of Black Pudding would fit here.
Right now the book is at 9,000 words with a loose target of 10,000. So I could stop any time, clean it up, and finish the art. Like everything I do, this is meant to be an idea packet, an inspirational booklet. It will not be "complete" in any sense. It will be broad strokes, heavy on color.
The Rock Hardies are a mountain range in Yria where redneck dwarfs dwell. They like to fight, make and drink beer, and think of ways to win back their ancestral city of Frimmsreach.
All of this is subject to change per my whims. But as it stands, the book is compatible with B/X (Old School Essentials). It includes a lot of dwarf social stuff, beer, mountain monsters, etc. I certainly have toyed with the idea of making it a Troika! book or putting a Labyrinth Lord logo on it. Or even some other game engine or even completely system neutral. But honestly this was always meant to be a B/X setting* and I can't think of a compelling reason not to follow through on that.
I'll post more when I have more.
And yes, the Supercalla follow up is still on the table. Hellion Cross will see its day.
*B/X with a healthy smattering of advanced material, natch.