Hans Augusto "H.A." Rey, together with his wife Margret Rey, were the authors and illustrators of children's books, best known for their Curious George series. Hans (who was born Hans Augusto Reyersbach in Hamburg, Germany) and Margret actually met in Brazil, where Hans was a salesman and Margret had gone to escape the rise of Nazism. They married in 1935 and moved to Paris that same year.
