Roger Duvoisin (1904-1980) was a Swiss-American author and illustrator. Born in Geneva, Switzerland, his first job was making textiles. He moved to New York City in 1927 where he wrote his first book. He received a Caldecott Medal for White Snow, Bright Snow by Alvin Tresselt. He is now known mostly for his Veronica and Happy Lion series. He married author Louise Fatio. In 1961 he received an award from the Society of Illustrators. In 1966 he received the Rugers Bi-Centennial award. He also won a Caldecott Honor Award for Hide and Seek Fog in 1966. In 1968 he received a Hans Christian Anderson Biennial runner-up award. He won the 1956 Deutscher Jugendliteraturpreis.