The book's central premise is that modern UFO encounters are part of a persistent phenomenon that has been with humanity throughout history, appearing in different forms depending on the cultural and technological context of the time. Vallée draws striking parallels between contemporary reports and historical folklore:
The title refers to a legendary land in the clouds described in medieval French chronicles where "aerial people" were said to dwell. Passport to Magonia: On UFOs, Folklore, and Par...
The book famously includes a massive appendix—"A Century of UFO Landings"—cataloging roughly 900 cases of alleged landings and occupants recorded between 1868 and 1968. Review: Passport to Magonia (1969) by Jacques Vallée The book's central premise is that modern UFO