- Author: M. K. Jessup Author Record # 37889
- Legal Name: Jessup, Morris Ketchum
- Birthplace: Rockville, Indiana, USA
- Birthdate: 2 March 1900
- Deathdate: 20 April 1959
- Language: English
- Webpages: ufomystic.com, Wikipedia-EN
- Used These Alternate Names: Morris K. Jessup
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Nonfiction
- The Case for the UFO (1955) [also as by Morris K. Jessup]
- The UFO Annual (1956)
- UFO and the Bible (1956)
- The Expanding Case for the UFO (1957)
- Saucers - Fact Not Fiction (1958) [only as by Morris K. Jessup]
- The Truth About Flying Saucers (1958) [only as by Morris K. Jessup]