The Flying Warlord(1989)
(The fourth book in the Adventures of Conrad Stargard series)
A novel by Leo Frankowski
For a twentieth-century man, Conrad Stargard had done a lot in thirteenth-century Poland. In just nine years, he had "discovered" universal education, aircraft, radios, steamboats, and machine guns. More important, he had prepared Poland to defeat the bloodthirsty Mongols in 1241.
But now that the Mongol hordes had arrived, something was disturbing the flow of history. Even the Time Masters who secretly watched over Conrad couldn't predict his future, because they no longer even knew their own past . . .
Genre: Science Fiction
Used availability for Leo A Frankowski's The Flying Warlord
December 1998 : USA Mass Market Paperback
September 1989 : USA Mass Market Paperback