The teachings of Aḥmad al-Ghazālī changed the course of Persian Sufism forever, paving the way for luminaries such as Rūmī, Aṭṭār, and Ḥāfiẓ. Yet he remains a poorly understood thinker, with many treatises incorrectly attributed to him and conflicting accounts in the historiographical literature. This work provides the first examination of Aḥmad al-Ghazālī and his work in Western scholarly literature. Joseph E. B. Lumbard seeks to ascertain the authenticity of works attributed to this author, trace the development of the dominant trends in the biographical literature, and reconstruct the life and times of Aḥmad al-Ghazālī with particular attention to his relationship with his more famous brother, Abū Hamid al-Ghazālī. Lumbard's findings revolutionize our understanding of Aḥmad al-Ghazālī writings, allowing for focus on his central teachings regarding Divine Love and the remembrance of God.