A respected author, translator and lecturer in the area of Islamic studies and a specialist in Persian language and Sufi literature, the late Dr Lewisohn (1953 - 2018) was a Research Associate at the London Middle East Institute at the School of Oriental and African Studies (SOAS), and Associate Member of the Centre for Iranian Studies also at SOAS . Dr Lewisohn's works include Beyond Faith and Fidelity: the Sufi Poetry and Teachings of Mahmud Shabistari (London, 1993), a critical edition of Divan-i Muhammad Shirin Maghribi (Tehran, 1993), The Wisdom of Sufism and several works of translation on Persian Sufism. He had also edited The Heritage of Sufism in three volumes (Oxford, 1999) and contributed articles to the Encyclopaedia of Islam, Encyclopaedia Iranica, and various academic journals. One of his final research projects was on the esoteric traditions of Islam.