I just finished reading these two books, Unveiling Islam & Christian Jihad, by the same authors who are brothers, Ergun Caner & Emir Caner, who were raised Muslim and both converted to Christianity. They offer a very unique perspective on both religions.
In Unveiling Islam they give a very accurate history of Islam from Muhammad to the present. It is a very well laid out look at it's history and beliefs. Their biggest goal of the book is to equip Christians with the tools needed to be more effective witnesses to Muslims.
In Christian Jihad they also give a very accurate history of Christianity in reference particularly to the Crusades and the Inquisition. One thing I didn't know that I learned by reading is that Pope Urban II, the pope who called the first Crusade, actually used as a part of his rallying call that if the crusader fought, he was assured salvation whether he died or not. This is where they got the title of the book as they show these two very dark spots on Christian history completely distorted the Bible. Unlike the Koran which actually says if you die in battle you go to paradise, that is absolutely no where in the Bible.Their main goal for this book was to give Christians a precise history of our past shortcomings, especially when the church and the state where too tightly linked for warfare, in hopes that we don't repeat them again due to those events still being a very hard obstacle to overcome in many parts of the world.