Myst: War of the Worlds
D’ni (pronounced dunNEE) is a civilization that lives in an underground cave system and has the ability to write books that will link to other lands. Once from a land called Garternay, impending doom caused the citizens to write new ages to escape to. Some people went to D’ni and others went to Terahnee. The original D’ni civilization was destroyed by Veovis and A’Gaeris.
Long ago in the history of D’ni, the civilization fell after a great rebellion. The people of D’ni scattered to many different world through the book portals to find a new home. Unfortunately the art of book writing was lost with the exodus, except to one family. Two generation passes, and the art of book writing is kept alive in the family.