The American academic and Orthodox Christian writer John Granger has analyzed the literature in a positive light. Granger, a Christian classicist, has defended the books in his book, "Looking for God in Harry Potter". Granger argues that the books do not promote the occult because none of the magic is based on summoning any sort of demon or spirit; he contrasts occult "invocational" magic (calling up spirit beings to do your bidding) with literature's common "incantational" magic (saying a set phrase to use power from an unspecified source). Indeed, says Granger, the themes of love triumphing over death and choosing what is right instead of what is easy are very compatible with Christianity.