A review God's Philosophers: How the Medieval World Laid the Foundations of Modern Science. I strongly recommend reading this post; It's both entertaining and educational. Note the title of this post is not a reference to Author himself, but rather something he talks about in his post (about a third of the way down).
I also recommend the review of God's Battalions: The Case for the Crusades by the same author. It was also an eye opener, but I was a bit more uncomfortable reading it; mostly because I actually agreed [Past tense is intentional] with the Author of the book he was reviewing.
Hattip to TJIC for pointing out that blog.