Description: An illuminating study of the mysterious Brethren of Purity', the 10th century letter writers whose epistles, although often deemed heretical, exerted a profound influence on the development of Shi'i Islam.
Brief description: Author Godefroid de Callatay is Professor of Islamic Studies at the University of Louvain.
Review Quotes: Its style is eloquent and lucid, and its arguments are coherent and delicately articulated.The text is informative and its reading enjoyable as well as engaging.-- "Nader el-Bizri - The Institute of Ismaili Studies"