It’s based on the mythology of The Lost Lands (which is also a system neutral with OSR/5E addendums) campaign settings which rocks on its own with a huge variety of lands. Somewhere between Greyhawk and Forgotten Realms but power/magic leans Greyhawk - depth leans FR.

https://www.indiegogo.com/projects/d...s/x/19831811#/

If 300 back it, it goes to hardcover instead.