The Chronicles of Amber
Prince Corwin, Oberon's son and the protagonist of the first five books of "The Chronicles of Amber", learns that Dworkin had been imprisoned by Oberon for several centuries. Oberon had deemed Dworkin to be dangerous and unstable, after Dworkin privately proposed that the Pattern should be destroyed. This would clear the way to create a new and undamaged Pattern, but would also result in the destruction of Amber and all of the alternate realities it cast as Shadows.