El Patito Feo ♥ The Ugly duckling over 60th + years ago yes, in the XX Century,(Siglo XX) I loved this book I still DO♥. I still cry is a mixture of sadness and happiness. Hans Christian Fairy Tales are wonderful, they can serve us to teach, most Fairy tales have a "Moraleja = moral of a fable.
Please don't forget the Children fairy Tail was first published in 1843 (MDCCCXLIII) exactly the 43 year of the 19th Century (Siglo XIX)
Many complain the book is bad a carry on about "Bulling" please read below the Etymology of "Bully"
*Etymology. The word "bully" was first used in the 1530s meaning "sweetheart", applied to either sex, from the Dutch boel "lover, brother", probably diminutive of Middle High German buole "brother", of uncertain origin (compare with the German buhle "lover"