Whichever magic book is being touted - the bible, kerrang, whatever - should be like the Monolith from 2001; the one that appeared at the Dawn of Man and imparts advanced knowledge directly into the apemen. That at least would be impressive and something you'd expect a god to be able to do.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'