Although the science of Al-Usul is mainly concerned with legal matters, its range and the arsenal of tools it uses makes it attractive to students of Islamic Jurisprudence as well as to other scholars of Islamic Knowledge and culture. The difficulties it poses are inevitable. This book, however, attempts to simplify this “Most important method of research ever devised by Islamic thought” during its most creative period, and bring it to the understanding and appreciation of the modern learner, while underscoring its importance and relevance to the world of Islam today.