Taqi al-Din Ibn Taymiyya (1263-1328) is one of the most controversial thinkers in Islamic history. Today he is revered by what is called the Wahhabi movement and championed by Salafi groups who demand a return to the pristine golden age of the Prophet. His writings have been a source ofinspiration for radical groups to justify acts of violence and armed struggle. In order to understand the widespread present-day influence and prominence of this rather obscure medieval figure, the book, through a series of articles written by leading authorities in the field, attempts to study Ibn Taymiyya's original contributions to Islamic theology, law, Qur'anic exegesis,and political thought. The book is the first comprehensive academic treatment of Ibn Taymiyya to appear in a Western language in over half a century.