Otto Willi Gail (18 July 1896 – 29 March 1956) was a German science journalist and author. Gail was born in Gunzenhausen, in the Middle Franconia region of Bavaria, Germany. He studied electrical engineering and physics at the Technical University of Munich. He worked for newspapers and radio broadcasting and wrote non-fiction books about physics, astronomy and space travel. He also wrote science fiction novels to delight the youth for these themes. He had good relations to the German space pioneers Max Valier and Hermann Oberth. As a result of these relationships he acquired special knowledge that influenced his books and gave them detailed realism. His novels were translated into American English and influenced early American utopian literature. He died in Munich.