Rethinking Ghosts in World Religions edited by Muzhou Pu/Mu-chou Poo.
Among the articles of potential interest:
"Wind and smoke : giving up the ghost of Enkidu, comprehending Enkidu’s ghosts"
"Belief and the dead in Pharaonic Egypt"
"The Roman manes : the dead as gods"
"The ghostly troop and the battle over death : William of Auvergne (d. 1249) connects Christian, Old Norse, and Irish views"