From Amazon:
In the third book of the Tales of the Flat Earth, Tanith Lee once again takes us into the dark and mystical world where five Lords Of Darkness reign over the inhabitants of the Flat Earth. One is Azrharn, Night's master, whose beauty and cruelty riddle the lives of the mortals with living nightmares and sensuous wickedness. Another, Uhlume, Lord Death...and a third - Delusion's Master. He is Prince Chuz, and he plagues the world with madness. When his sights are set on touching Azhrarn with a bit of lunacy, he begins a war of the titans, which cannot be resolved until justice has been served..
In the third book of the Tales of the Flat Earth, Tanith Lee once again takes us into the dark and mystical world where five Lords Of Darkness reign over the inhabitants of the Flat Earth. One is Azrharn, Night's master, whose beauty and cruelty riddle the lives of the mortals with living nightmares and sensuous wickedness. Another, Uhlume, Lord Death...and a third - Delusion's Master. He is Prince Chuz, and he plagues the world with madness. When his sights are set on touching Azhrarn with a bit of lunacy, he begins a war of the titans, which cannot be resolved until justice has been served..