On display within the Topkapi Palace Museum in Istanbul lies the Topkapi Codex--an ancient manuscript of the Koran involved in the murder that split Shiite from Sunni. What's the truth about the Topkapi Codex? Is there blood on it? Are its contents the same as the modern Koran's? No one knows because the Topkapi Codex is off limits to research. Mohammed Atareek is obsessed with getting his hands on this mysterious manuscript. His research has convinced him that the Koran has been changed many times, and the text of the famous codex could prove it. But other scholars are turning up dead. Did...