Sufism

The Sufism of the Rubáiyát, or, the Secret of the Great Paradox

Omar Khayyam

Letters from a Sûfî Teacher

Sharaf al-Din Ahmad ibn Yahya Maniri

Mystics and Saints of Islam

Claud Field

The Confessions of Al Ghazzali

Ghazzali

The Persian Mystics

Jalálu'd-dín Rúmí

Maulana Jalal al-Din Rumi