In Anne Rice's extraordinary novel, the Vampire Lestat--outsider, canny monster, hero-wanderer--is snatched from the world itself by the most dangerous adversary he has ever known. Memnoch, a mysterious being who claims to be the Devil. He is invited to be a witness at the Creation. He is take like the ancient prophets into the heavenly realm and is ushered into Purgatory. Lestat must decide if he can believe in the Devil or in God. And finally, he must decide which, if either, he will serve. 

Memnoch the Devil by Anne Rice