This four-volume set by Yves Naud explores the topic of UFOs and extraterrestrials in history. It is a rare and unique collection that is sure to fascinate readers interested in the subject. The hardcover books were published in 1978 by Editions Ferni and are an original printing. The author provides a detailed account of the history of UFO sightings, encounters, and theories about extraterrestrial life. This collection is a must-have for collectors of rare and vintage books on the subject.

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