The Book of Lies is a seminal work of occult philosophy by Aleister Crowley, first published in 1913. It is structured as a series of 93 short "stanzas" or chapters, each with a title and a number, exploring various esoteric concepts and magical practices.

The Book of Lies is a foundational text within occult and esoteric circles, particularly for adherents of Thelema. Its cryptic and symbolic nature has led to extensive interpretation and commentary over the decades. Scholars and practitioners alike engage with its dense philosophical and magical content, making it a subject of ongoing study and debate within the field of Western esotericism. The work's enduring influence is evident in its continued relevance and the numerous analyses it has inspired.