From publisher blurb:
Stack gang gonna stash you in a trash can, watching-gonna call you a trash man, when you get trashed by the stack gang
Trashed,
Trashed,
Trashed,
You been trashed by the stack Gang
Stack
Stack
Stack
What's inside?
D6 STACK GANGS (a group of people standing on each other's shoulders)
lists and lists of things that only STACK GANGS can do
D33 STACK GANG Magic (yeah, only they can cast it)
D6 HEAPS (which are STACK GANGs in piles)
The TrashCorps: D3 Trashmen ( who get stuffed in trash cans), D3 TrashCans (to get stuffed into)
NEW ADVENTURE "Double Decker"
Featuring Flat Ones and their oppressive rulers the Flat Men.
Encouters in the Flatlands ranging from awkward to absurd
Wandering Monster Tables because every setting needs them
I guess that's the sum of the parts above. It's just a setting book, with background, bestiary entries, and an adventure.
If none of that seems interesting then this book goes in a trashcan.