This book approaches the Koran with the tools of modern scientific philology and outlines a method to shed light on Koranic passages that are among those counted as 'dark' or 'mysterious'. It is a revised and expanded translation of the groundbreaking German original. This is the most fascinating book ever written on the language of the Koran, and if proven correct in its main thesis, probably the most important book ever written on the Koran. (The Guardian).