Louise Emma Fatio Duvoisin (August 18, 1904 – July 26, 1993) was a Swiss-born American writer of children's books. Many were created in collaboration with her husband Roger Duvoisin, a Swiss-born illustrator, and she is known best for their picture book series Happy Lion. The Happy Lion (1954), first in the series, won the inaugural, 1956 Deutscher Jugendliteraturpreis in its German-language translation (Der glückliche Löwe). Source: Wikipedia (en)