D'ni (pronounced duh-nee) is the mythical civilization
which serves as the major backstory device for the video game
. The D'ni had discovered how to write books which link
ed to other ages.
Misspelled as "dunny" in Myst.
Myst and Riven take place two generations after the destruction of D'ni.
For More info read the trilogy: Myst: The book of Atrus, Myst: The book of Ti'ana, Myst: The book of D'ni