The Sacred Books of Thelema gathers foundational writings of the Thelemic tradition, charting a visionary religious and literary universe in which ritual, revelation, commentary, and magical instruction intersect. Its texts range from prophetic prose and liturgical declarations to learned translations and esoteric exegesis, revealing the formal variety of modern occult literature. Revelatory passages, ceremonial formulae, and interpretive frameworks appear not as isolated curiosities but as mutually illuminating elements of a developing sacred canon. The collection brings together figures associated with the late nineteenth- and early twentieth-century occult revival, a milieu shaped by Hermeticism, ceremonial magic, Egyptomania, comparative religion, and new experiments in spiritual authority. Aleister Crowley's Thelemic innovations are placed in productive relation to S. L. MacGregor Mathers's formative work in ritual and textual transmission, while Mary d'Este Sturges's presence underscores the often-overlooked networks of collaboration, translation, and participation surrounding esoteric movements. Together, these voices illuminate Thelema's inheritance from the Western mystery tradition and its transformation into a distinctive modern religious current. This volume is recommended for students of religion, literature, cultural history, and esotericism, as well as readers seeking direct engagement with Thelemic primary texts. Its varied forms and perspectives invite careful comparison, offering both an educational introduction to a complex tradition and a rich dialogue between revelation, scholarship, and practice.