His published books include translations of Rumi's longest poem, known as the Masnavi, into simple English. The Masnavi: Book One was published in 2004 and was awarded the Lois Roth Prize for excellence in translation of Persian literature by the American Institute of Iranian Studies. He continued with The Masnavi: Book Two in 2007, The Masnavi: Book Three in 2013 and The Masnavi: Book Four in 2017.