*Liber HAD sub figura DLV* is a ritual instruction manual from the Thelemic tradition, published under the authority of the A∴A∴ (Aleister Crowley's magical order) and cross-referenced throughout to Crowley's foundational scripture, the *Book of the Law*. Its subject is a structured contemplative and magical practice aimed at achieving mystical union between the two cosmological principles of Thelema: Nuit (infinite space, the all-encompassing goddess) and Hadit (the infinitely contracted point of individual consciousness). The text organizes its content into distinct categories — Practices of Intelligence (intellectual comprehension of Hadit's nature), Practices of Meditation (progressive identification with Nuit and Hadit), Practices of Ethics (cultivating proud, vigorous, uncompromising selfhood), and Practices of Magick Art (ritual invocations and observance of appointed feasts). Distinctively, the text explicitly prescribes "wine and strange drugs" as a preliminary magical tool, with an editorial note suggesting the aspirant should become so sensitized that even the smell may suffice. The promised results follow a defined arc: unusual automatic breathing, the appearance of inner light, a Samadhi-state merging the two infinities within the practitioner, and ultimately a prolongation of life that nonetheless climaxes in physical death as the practice's final fulfillment. This is a narrow, esoteric practitioner's manual rather than an introductory or philosophical text — it assumes familiarity with Thelemic cosmology and the *Book of the Law*, and reads as a step-by-step operational guide for advanced initiates.