'Yousef Casewit's study does justice to one of the greatest figures of Muslim spirituality and thought in medieval al-Andalus, Abu al-Hakam Barrajan (d. 536/1141). For the first time, Ibn Barrajan's work, with its focus on commentaries on the divine names and the Quran, is placed in its context and approached as a whole. Situated between Ibn Massara and Ibn Arabi, this work illustrates a path based on a spiritual reading of the Quran and rooted in itibar, the passage from outward meaning towards inward significance, from this world to the next. Yousef Casewit emphasizes the originality of this author, who undertakes a synthesis of traditional Islamic knowledge and Neo-Platonist philosophy, as inspired by the Brethren of Purity (Ikhwan al-safa). Beyond Sufism and philosophy, The Mystics of al-Andalus represents the quest for universal wisdom in the Divine mystery concealed within revelation and the world.' Denis Gril, Professor Emeritus, Aix Marseille Université.