gods (small g) at war (Defeating the idols that battle for your heart) by Kyle Idleman, Pilgrims Progress as well as Little Pilgrims Progress. Doomsday Book by Connie Willis and the entire Dark Tower Series by Stephen King. Tim Powers is a good author altho few people seem to have heard of him. My favorite by him is The Anubis Gates. I like parallel worlds stories like The Talisman by Stephen King and Peter Straub altho I haven't read any for awhile.