written by Heidi E.Y. Stemple written by Heidi Fiedler written by Didier Levy written by Heidi Doxey written by Heidi Fiedler. written by Heidi Fielder written by Didier Lévy written by Heidi Howarth written by Jane Yolen and Heidi E.Y. Stemple written by Jane Yolen and Heidi E. Y. Stemple