Aminrazavi, Mehdi. 1995. “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 12 (4). USA:568-71. https://doi.org/10.35632/ajis.v12i4.2360.