This profound work by the esteemed Mauritanian scholar Ma al-Aynayn Ibn al-Shaykh Muhammad Fadil al-Shinqiti al-Hasani, titled 'Madhab al-Makhouf ala Da'awat al-Huruf,' delves into the intricate esoteric sciences related to the spiritual power and hidden meanings of Arabic letters. It explores the profound implications of these letters in various invocations and spiritual practices within Islamic mysticism. The author presents a unique and deep perspective on theurgical principles, guiding readers through methodologies for harnessing the inherent energies believed to reside within the alphabet, making it a significant contribution to hurufism.