The Devil: Perceptions of Evil from Antiquity to Primitive Christianity
Satan: The Early Christian Tradition
Lucifer: The Devil in the Middle Ages
Mephistopheles: The Devil in the Modern World
In that respective order. So far I am halfway through the second book. Very well written and researched with copious source citations. Early in the first book it is easy to become disheartened because he feigns a more liberal stance towards the devil, but towards the end he reveals his true thoughts on a more conservative view towards evil and the personification of it.