Nasir al-Din Tusi, the renowned Shi'i scholar of the 13th century, produced a range of writings in different fields of learning under Ismaili patronage and later under the Mongols. This is a new English translation of his Rawda-yi taslim - the single most important Ismaili text from the Alamut period. Here the Persian and English texts are published together for the first time to produce a work of enormous value to students of Islamic theology and philosophy. The book contains an introduction by Professor Hermann Landolt and philosophical commentary by Professor Christian Jambet, who has produced a French translation of this text.