Aminrazavi, Mehdi. “Early Philosophical Shi’ism: The Isma’ili Neoplatonism of Abu Yaqub Al-Sijistani By Paul E. Walker. Cambridge, UK and New York: Cambridge University Press, 1995, 203 Pp”. American Journal of Islam and Society, vol. 12, no. 4, Jan. 1995, pp. 568-71, doi:10.35632/ajis.v12i4.2360.