Encyclopaedia of Hell II - Martin Olson

After Hell''s army conquers Insignificant Earth and devours the human race in a celebratory feast, Lord Satan reveals that he will now depose God and take his rightful place as Emperor of Existence. Now Lord Satan must face Oblivion when he enters Heaven''s labyrinthine Library, from which there is no escape. But when the armies of Hell arrive to find Lord Satan and conquer Heaven, instead they find a disturbing secret at the core of Creation too shocking for even a demon to stomach.