The twelfth century CE was a watershed moment for mysticism in the Muslim West. In al-Andalus, the pioneers of this mystical tradition, the Mu'tabirun or 'Contemplators', championed a synthesis between Muslim scriptural sources and Neoplatonic cosmology. Ibn Barrajān of Seville was most responsible for shaping this new intellectual approach, and is the focus of Yousef Casewit's book. Ibn Barrajān's extensive commentaries on the divine names...