The setting was created by Jack W. Shear, and he released a couple compendiums. (Check out his blog!)
On my Fictive Hack resource page, I have a section on “The World Between.” Mr. Shear designed his setting to work with Dungeons and Dragons, I am adapting it to work with “Fictive Hack”. I explain why I think it will work here. My other Fictive Hack Obsidian Portal site is here.
The current year is 6,995.