The Book of the Law is the central sacred text of Thelema, written by Aleister Crowley in Cairo, Egypt in the year 1904. Its full title is "Liber AL vel Legis, sub figura CCXX, as delivered by XCIII=418 to DCLXVI", and it is commonly referred to as Liber AL vel Legis or just "Liber Al". It contains three chapters, each of which was written down in one hour, beginning at noon, on April 8, April 9, and April 10.