http://book.klll.cc/ebooks/subject/6417.opds 2025-08-06T07:32:01Z Books about Unidentified flying objects (sorted by popularity) Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-08-06T07:32:01Z https://book.klll.cc/ebooks/subject/6417.opds?sort_order=title Sort Alphabetically by Title 2025-08-06T07:32:01Z https://book.klll.cc/ebooks/subject/6417.opds?sort_order=release_date Sort by Release Date 2025-08-06T07:32:01Z https://book.klll.cc/ebooks/66639.opds The World of Flying Saucers: A Scientific Examination of a Major Myth of the Space Age Donald H. Menzel and Lyle Gifford Boyd 2025-08-06T07:32:01Z https://book.klll.cc/ebooks/17346.opds The Report on Unidentified Flying Objects Edward J. Ruppelt 2025-08-06T07:32:01Z https://book.klll.cc/ebooks/5883.opds The Flying Saucers are Real Donald E. Keyhoe 2025-08-06T07:32:01Z https://book.klll.cc/ebooks/25706.opds Federal Bureau of Investigation FOIA Documents - Unidentified Flying Objects United States. Federal Bureau of Investigation 2025-08-06T07:32:01Z https://book.klll.cc/ebooks/25674.opds USAF Fact Sheet 95-03 United States. Air Force 2025-08-06T07:32:01Z https://book.klll.cc/ebooks/5884.opds The Flying Saucers are Real Donald E. Keyhoe