I don't know if this was suggested before, but as a fan of "The Secret History of the World," I think it would be cool to read a backstory (trilogy?) on the construction of the Keep or futher tales of the battles between Glaeken and Rasalom. Since Rasalom has been killed before (a la "Demonsong" and info illustrated in Gateways) I think it would be cool to read about their struggle throughout the ages. Anyone agree?
"Soon you will be like me. Then who will lock you up in the cellar?"