About the Author

Sahl ibn 'Abd Allah al-Tustari was an important esoteric commentator who lived during the formative period of Islamic mysticism.

Annabel Keeler has published a number of articles in the field of Islamic mysticism and Sufi hermeneutics.

Ali Keeler has spent almost 10 years in the Middle East—in Yemen and Damascus—where he taught English, studied and read through several classic works of Islamic mysticism with living Sufi masters. He is the translator of Great Saints, Selected Prayers of the Prophet Muhammad,  and A Tourist Guide to Craq de Chevalier.

Yousef Meri is a fellow and special scholar-in-residence at the Royal Aal al-Bayt Institute for Islamic Thought in Jordan.