2011 Reprint of 1938 American Edition. "Liber AL vel Legis' or "The Book of the Law" is the central sacred text of Thelema, written by Aleister Crowley in Cairo, Egypt in the year 1904. Crowley says that the author was an entity named Aiwass, whom he later referred to as his personal Holy Guardian Angel (or "Higher Self"). The interpretation of the often cryptic text is generally considered a matter for the individual reader. The general method that Crowley used to interpret the obscurities of the book was the Qabalah. This edition also reproduces the original manuscript in Crowley's hand from which the printed version is composed.