Ludwig Bemelmans was an essayist, humorist, novelist, artist and an author of books for children. Hansi was the first of Bemelmans' fifteen children's books. It was very well received by most reviewers, but it was Madeline, which brought Bemelmans his greatest success.
Although Bemelmans became famous for his Madeline books, he always considered himself more an artist illustrator than a writer, and later in life he became a serious painter with works now on display in the Metropolitan Museum in New York and the Museé National d'Art of Paris.
Besides children's books, Bemelmans wrote adult books and was a contributor of many magazines, including Vogue and The New Yorker. Bemelmans also did many cover illustrations for The New Yorker.