The Equinox (subtitle: The Review of Scientific Illuminism) is a periodical that serves as the official organ of the A∴A∴, a magical order founded by Aleister Crowley (although material is often of import to its sister organization, Ordo Templi Orientis).

Begun in 1909, it mainly features articles about occultism and magick, while several issues also contained poetry, fiction, plays, artwork, and biographies.

After that, editions of the Equinox were published irregularly by various organizations and are best known by their book titles.

However this is not the case as Aleister Crowley later published Volume III No.

[citation needed] Published after Crowley's death, a series entitled The Equinox, Volume V was released by Marcelo Motta and his organization, Thelema Publishing Co.