An interregnum in the Clarkwoods Literary Universe is the pause between iterations of reality. This purgatorial period is the result of The River Without End compressing all of existence into a single point of infinite density in a climactic event called The Calamity.
During each interregnum, all life which survived the aforementioned Calamity reappears on a single super-continent called Eden—which is surrounded on all sides by the River Without End.
The sapient beings collected there then begin planning to restart reality. Inspired by The Tale of the Seven, a search begins to find the seven individuals who will sing the next iteration of the universe into existence. This culminates, eventually, in a new Big Bang.