Presents the heresiographical "Chapter on Satan"(B?b al-shay n) from a long unrecognized Islmaili work called the Kit?b al-shajara by the 4th/10th century Khur?s?n? d?'?, Ab? Tamm?m.
Wilferd Madelung is Laudian Professor of Arabic at the University of Oxford.Paul E. Walker, Ph.D. (1974), University of Chicago, is the author of several books and a number of smaller studies on various aspects of Ismaili history and doctrine.
