The Book of Lies was written by English occultist and teacher Aleister Crowley under the pen name of Frater Perdurabo. As Crowley describes it: "This book deals with many matters on all planes of the very highest importance. It is an official publication for Babes of the Abyss, but is recommended even to beginners as highly suggestive."
The book consists of 91 chapters, each of which consists of one page of text. The chapters include a question mark, poems, rituals, instructions, and obscure allusions and cryptograms. The subject of each chapter is generally determined by its number and its corresponding Qabalistic meaning.

Aleister Crowley (1875 – 1947) was an English occultist, ceremonial magician, poet, painter, novelist, and mountaineer. He founded the religion of Thelema, identifying himself as the prophet entrusted with guiding humanity into the Æon of Horus in the early 20th century.