This book was deemed controversial in parts of America. It was banned from general circulation in the Alabama state library system.
"I was completely unaware that animals with white fur, such as white polar bears and white dogs and white rabbits, were considered blood relations of white beings. I was only aware that a white horse next to a black horse looks very picturesque." Williams said his story was not written for adults, who "will not understand it, because it is only about a soft furry love and has no hidden message of hate."
Garth Montgomery Williams (April 16, 1912 - May 8, 1996) was an American artist who came to prominence in the postwar era as an illustrator of children's books. Many of the books he illustrated have become classics of children's literature.