Virginia Walton Pilegard wrote The Warlord's Puzzle as part of a teaching unit that uses informal geometry to strengthen students' visual learning abilities. Mrs. Pilegard studied elementary mathematics and completed both a B.A. and M.A. in Education. She then went on to teach elementary grades and in juvenile correction schools. Nicolas Debon is a freelance illustrator in Versailles, France. In addition to his illustrations for the Warlord s Series, he is also the author/illustrator of several other books, including two Canadian Governor General s Literary Award finalists.