Konx Om Pax: Essays in Light (1907) by Aleister Crowley is a foundational, esoteric collection merging Hermeticism, Magick, and satire, exploring the theme of "Light in Extension" (or Khabs am Pekht). The text features four diverse essays—poetry, prose, and plays—highlighting Golden Dawn occult teachings, and is characterized by its blend of profound mystical insight and satirical wit. The book is considered a "masterwork of Hermeticism and Magick" and an essential, if challenging, text for understanding early 20th-century occultism.