Theological Thrillers?

I have just finished reading Paul Maier's "A Skeleton in God's Closet." It was excellent! I really enjoy a good thriller/mystery book and was completely unaware that there was an entire genre dedicated to the "theological thriller." Obviously, "The Da Vinci Code" would be a book that would fit well into this category....does anyone have other suggestions? I'm excited to hit my public library ASAP!