Start with high-confidence sufism books, then narrow by subgenre or adjacent topics.
The Shape of Light
Shihabuddun Yahaya al-Suhrawardi, Shaykh Tosun Bayrak al-Jerrahi al-Halveti
The Book of Assistance
Imam 'Abdallah Ibn Alawi al-Haddad, Dr. Mostafa al-Badawi
Tears From the Mother of the Sun
Pir Zia Inayat Khan, Amruta Patil
