Louise Fatio Duvoisin 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).
A pleasant little picture book here for the young, and young at heart, and one that is apparently popular in days of you're, although I have no memory of it from when I was young.
Checked this out from the library and read it to my 4 month old son. He enjoyed the pictures and has been roaring like a lion ever since we first read it and talked about lions.