UFO Religions: Global Movements Rooted in Theosophy and Notable Controversies

To the point

UFO religions are worldwide religious groups centered on alleged contact with extraterrestrials and a millenarian aim to solve ecological, spiritual, and social problems, rooted in Theosophy and featuring early movements such as the I AM Activity and the Aetherius Society (George King), with the 1947 Roswell incident seen as a turning point, and including both controversial cases like Heaven’s Gate and the Order of the Solar Temple and broader movements such as Scientology, Raëlism (Raël), the Church Universal and Triumphant (Mark Prophet), and Falun Gong (Li Hongzhi) across many countries.

Behold a Pale Horse
Behold a Pale Horse
Milton William Cooper
 Passport to Magonia: From Folklore to Flying Saucers
Passport to Magonia: From Folklore to Flying Saucers
Jacques Vallee
 Atlas of Unidentified Flying Objects
Atlas of Unidentified Flying Objects
Andy McGrillen
 Chariots of the Gods: 50th Anniversary Edition
Chariots of the Gods: 50th Anniversary Edition
Erich Von Daniken
Our recommendations from Amazon
wikipedia.org

List of UFO religions - Wikipedia

UFO religions are a globally diverse set of religious movements centered on communication with extraterrestrials and millenarian hopes, often drawing on Theosophical and New Age ideas, with pivotal moments such as Roswell and debates about origins (including I AM Activity and the Aetherius Society), notable controversies like Heaven's Gate and the Order of the Solar Temple, and a wide array of groups—from Aetherius Society (George King, 1955) and Raëlism (Raël, 1974) to the Church Universal and Triumphant (Mark Prophet, 1958) and Falun Gong (Li Hongzhi, 1992)—alongside smaller outfits such as Ashtar Galactic Command, Ground Crew, and I AM Activity.