claim: Truman Capote spent four years writing the book.
evidence: Abu al-Najib Abd al-Qadir Suhrawardi -LRB- 1097 -- 1168 -RRB- was a Sunni Persian Sufi who was born in Sohrevard , near Zanjan , and founded the Suhrawardiyya Sufi order .. Sunni. Sunni. Persian. Persian people. Sufi. Sufi. Sohrevard. Sohrevard. Zanjan. Zanjan ( city ). Suhrawardiyya. Suhrawardiyya. He studied Islamic law in Baghdad , then set up a retreat by the river Tigris , where he gathered disciples , which eventually came to be the Sufi order of Suhrawardiyya .. Sufi. Sufi. Suhrawardiyya. Suhrawardiyya. Islamic law. Sharia. Baghdad. Baghdad. Tigris. Tigris. His paternal nephew Shahab al-Din Abu Hafs Umar Suhrawardi expanded the order .. Shahab al-Din Abu Hafs Umar Suhrawardi. Shahab al-Din Abu Hafs Umar Suhrawardi. His name is also sometimes transcribed as Diya al-din Abu ` n-Najib as-Suhrawardi .