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 German: [[Deutscher Jugendliteraturpreis]] in its German-language translation (German: Der glückliche Löwe).
Fatio was born August 18, 1904, in Lausanne, Switzerland, and educated in Geneva. She emigrated to the United States in 1925 and became a naturalized citizen in 1938.
Fatio's earliest work in the U.S. Library of Congress catalog is The Christmas forest, a 48-page book illustrated by Duvoisin, with a 1950 copyright date.[1] It was published by Aladdin Paperbacks no earlier than 1967, perhaps earlier in hardcover. Her first book published was The Happy Lion in 1954.
A resident of Peapack-Gladstone, New Jersey and then Chester Township, New Jersey, Fatio died on July 26, 1993, at the age of 89 at a nursing home in Somerset, New Jersey.[2]