G. de Callataÿ - S. Moreau, Introduction. Part I. ANDALUSI CHANNELS OF TRANSMISSION. M. Forcada, Rational and More Than Rational Sciences in the Umayyad Caliphate: Dialogue, Debate, and Confrontation – P. Walker, Intense Rivalry, Sectarian Secrecy, and Doctrinal Recourse to Reason: Obstacles to the Fourth-/Tenth-Century Transmission of Isma‘ili Thought to al-Andalus. Part II. CONTEXTUALIZING THE ORIENT. T. Zadeh, Tracing the Sorcerer’s Circle: Demons, Polysemy, and the Boundaries of Islamic Normativity – R. Forster, To What Extent Is Alchemy an Esoteric Science? A Case Study of Ibn Arfa‘Ra’s (fl. sixth/twelfthe century) – P. Lory, Jabir b. Hayyan’s Alchemy, Ibn ‘Arabi, and the Reading of the Book of Nature – E. van Dalen, Who are the Sethians in the Nabatean Agriculture? Part III. AROUND THE CORPUS OF THE IKHWAN AL-SAFA’. J. Mattila, Fihrist of the Rasa’il Ikhwan al-Safa’: Textual Variants and Their Relation to al-Risala al-Jami‘a – C. Baffioni, The Andalusi Reception of Ontological Options and Cosmological Descriptions in the Ikhwan al-Safa’ and al-Risala al-Jami‘a: A Case Study – G. Ferrario, In a Hidden Place: Traces of Batinism in the Fragments of the Cairo Genizah – L. Tribuzio, Restoring Harmony through the Propaedeutic Science of Music: A Reconsideration of the Brethren of Purity’s Epistle on Music and Its Relation with the Epistle on Proportions – N. El-Bizri, The Mathematical Orders of Architecture: Seeing Madinat al-Zahra’ from the Perspective of the Ikhwan al-Safa’. Part IV. TWO NEWLY EDITED TEXTS ON MAGIC. L. Saif – C. Burnett, The Book on Attracting the Ruhaniyya of Every Animal: A Pseudo-Aristotelian Hermetic Text – G. de Callataÿ - S. Moreau, An Arabic Version of Qusta b. Luqa’s De Physicis Ligaturis? Part V. KNOWLEDGE ORGANIZATION. G. de Callataÿ - R. Baranx - H. Naets, M-Classi: A New Digital Tool for the Classification of the Sciences, in Islam and Beyond. INDEXES. Index of Names of People (only ancient). Index of Titles of Works (only ancient). Index of Manuscripts.