Osprey Publishing is a British publishing company specializing in military history based in Oxford. Predominantly an illustrated publisher, many of their books contain full-colour artwork plates, maps and photographs, and the company produces over a dozen ongoing series, each focusing on a specific aspect of the history of warfare. Their publications include the Men-at-Arms series, running to over 500 titles, with each book dedicated to a specific historical army or military unit. Osprey is an imprint of Bloomsbury Publishing.

Etan Ilfeld is a London-based entrepreneur and the founder of Tenderbooks, Tenderpixel gallery, Watkins Mind Body Spirit Magazine, Watkins Wisdom Academy, PlayStrategy.org, co-founder of Repeater Books, a venture partner at Remagine Ventures, and the owner and managing director of Watkins Books, Watkins Media, and the Mind Sports Olympiad. Ilfeld is the inventor of Diving chess and the author of Beyond Contemporary Art, co-author of Duchamp versus Einstein and the creator of the Synchronicity Oracle. He is also the host of the Etan Ilfeld Podcast.