For scholars, spiritual seekers, and students of Islamic history, few books hold as much prestige as Hilyatul Awliya wa Tabaqat al-Asfiya (The Ornament of the Saints and the Ranks of the Pure Ones). Written by the revered Persian scholar Abu Nu'aym al-Isfahani (948–1038 CE), this ten-volume masterpiece is a cornerstone of Sufi biography (Tadhkirah) and Hadith scholarship.