•
Flying with Lindbergh, 2003 (reprint), Kessinger Publishing, •
The Flying Saucers Are Real (1950), 2006 (reprint), Cosimo Classics, •
Flying Saucers from Outer Space (1953),
Henry Holt and Company, NY •
The Flying Saucer Conspiracy, 1955, Henry Holt and Company, NY, •
Flying Saucers: Top Secret, 1960,
G.P. Putnam & Sons, ASIN B000EB427C •
Aliens from Space: The Real Story of Unidentified Flying Objects, 1973, Signet Press, ASIN B000HYOMMG •
The Vanished Legion, 2011 (reprint), Age of Aces, •
Captain Philip Strange: Strange War, 2011 (reprint), Age of Aces, •
The Complete Adventures of Richard Knight Volume 1, 2011 (reprint), Altus Press, •
The Complete Adventures of Richard Knight Volume 2, 2017 (reprint), Altus Press, •
Captain Philip Strange: Strange Enemies, 2012 (reprint), Age of Aces, •
Captain Philip Strange: Strange Operators, 2014 (reprint), Age of Aces, • ''The Jailbird Flight: Dead Man's Drome'', 2015 (reprint), Age of Aces, •
Captain Philip Strange: Strange Staffels, 2015 (reprint), Age of Aces, •
The Complete Adventures of Eric Trent, Volume 1, 2016 (reprint), Altus Press, •
Captain Philip Strange: Strange Spectres, 2016 (reprint), Age of Aces, •
Captain Philip Strange: Strange Hell, 2017 (reprint), Age of Aces, •
Captain Philip Strange: Strange Squadrons, 2018 (reprint), Age of Aces, •
The Jailbird Flight: The Devil Flies High, 2018 (reprint), Age of Aces, •
Captain Philip Strange: Strange Deaths, 2019 (reprint), Age of Aces, •
Captain Philip Strange: Strange Rivals, 2021 (reprint), Age of Aces, •
Devildog Squadron: The Crimson Fog, v1 2022 (reprint), Age of Aces •
Devildog Squadron: The Flying Juggernaut, v2 2023 (reprint), Age of Aces •
The Complete Adventures of Eric Trent, Volume 2, 2023 (reprint), Altus Press ==References==