What was the publishing date of 101 dalmatians the book?

The book "The Hundred and One Dalmatians," written by Dodie Smith, was first published in 1956. It tells the story of Pongo and Perdita, two Dalmatians who try to rescue their stolen puppies from the villainous Cruella de Vil. The story has since been adapted into various films and other media, gaining widespread popularity.