Annemarie Schimmel 
Make A Shield From Wisdom [PDF ebook] 

First published in 1993. This is a collection of Selected Verses from Nasir-i Khusraw»s Dzvan. The work of the Persian author in both its philosophical and poetical aspects has been known in the West for more than a century. The outward political and religious events of the first half of the eleventh century were the canvas on which Nasir-i Khusraw»s poetry and prose developed.