Recommend One Book

I posted a request at The Raytractors. I thought I would post it here along with the results, in case others have things to add:

If you are a Christian, recommend one book that you think all atheists should read. If you are an atheist, recommend one book that you think all Christians should read. Briefly describe why they should.

To the Christians: if you agree to read my recommended book, I will agree to read your recommended book.

Atheist Recommendations to Christians
Me: Age of Reason by Thomas Paine
Maragon: The Demon-Haunted World: Science as a Candle in the Dark by Dr. Carl Sagan
Weemaryanne: The Hitchhiker's Guide to the Universe by Douglas Adams
Nonmagical Thinking: Misquoting Jesus by Bart Ehrman
MacGyver Jr: Evolution for Everyone by David Sloan Wilson
MacGyver Jr: Your Inner Fish by Neil Schubin (he cheated with a second one)
MacGyver Jr: Finding Darwin's God by Ken Miller (he cheated again)
Lance Christian Johnson: Who is Jesus? by John Dominic Crossan
Mjarsulic: Evolution: What the Fossils Say and Why It Matters
Mjarsulic: Asimov's Guide to the Bible
TripMaster Monkey: God's Debris, by Scott Adams
Rufus: Has Science Found God and God: The Failed Hypothesis by Victor Stenger
Andrew Louis: Zen and the Art of Motorcycle Maintenance by Robert Pirsig
Benjamin Franklin: Stranger In A Strange Land by Heinlein
Mudskipper: 101 things to do with your G/B friend or wife (website, another cheater :P)
Andrew Louis: Being and Time by Martin Heidegger
Andrew Louis: Zen Buddhism by D.T. Suzuki
Andrew Louis: The Power of Myth by Joseph Campbell
Pvblivs: Displaced Person by Eric Frank Russell

Christian Recommendation to Atheists
The one brave Christian soul over at The Raytractors:
Fourkid: The Robe by Lloyd C Douglas

If I could cheat and add another book, it would be a science book: A Brief History of Time by Stephen Hawking. Yes, that book which Ray quote mines from in his header to show that Hawking believes in God. But since I can't cheat, I won't. :-)