Books like Flying saucers from outer space by Donald E. Keyhoe

Frank E. Stranges presents an account of a 1957 extraterrestrial landing in Virginia, detailing interactions with Pentagon officials and the figure Valiant Thor, complete with photographs and claims of ongoing alien oversight.

In The Day After Roswell, retired Colonel Philip J. Corso reveals declassified documents and his own role in managing alien artifacts recovered from the 1947 Roswell crash, shedding new light on the U.S. government's involvement.

From Amazon: This astonishing new bestseller from the author of the sensational "Flying Saucers - Serious Business" provides answers to the most frequently asked questions about UFOs: -Where do they come from? -Is it true that they are often tracked on radar? -Has anyone actually talked to UFO pilots or taken a ride in a flying saucer? -Who was the first astronaut to see a UFO in orbit? This collection of well-documented reports of UFO sightings, presented by America's most popular paranormal radio personality, Frank Edwards, covers the gamut of ufology, including: -The Brazilian farmer who was twice seduced by a beautiful blonde spacewoman... -The New Hampshire couple who were kidnapped, probed, and interrogated by the space visitors... -The California mystic who has met with the outer space people several times, and photographed their ships... -The newest hoaxes, kooks, and hard-to-believe tales in print! "Flying Saucers - Here and Now" presents startling new evidence that UFOs really do exist, and presents UFO sightings by: a Florida governor; scores of police officers; a Maryland newspaper editor; a Texas bank president; a Kansas police chief; a New Orleans colonel; two Australian constables; members of the Royal Canadian Air Force; as well as psychologists, airline pilots, scientists, and top executives. From the book's forward by the author: This is the chronicle of recorded events in the fascinating field of Unidentified Flying Objects in the past sixteen months. If the evidence constitutes what it seems to indicate, the presence of the UFOs amounts to one of the greatest news stories of all time and, as a professional newsman for more than forty years, I have tried to deal with it as such.

Speculation on the origins of flying saucers and their historical role in ancient writings. Mr. Adamski also describes his encounter with a being from another planet.