"The fairy tale is in a perpetual state of becoming and alteration. To keep to one version or one translation alone is to put a robin redbreast in a cage. If you, the reader, want to tell any of the tales in this book, I hope you will feel free to be no more faithful than you want to be. You are at perfect liberty to invent other details than the ones I've passed on, or invented, here. In fact you're not only at liberty to do so: you have a positive duty to make the story your own. A fairy tale is not a text."
—Phillip Pullman, introduction to 'Fairy Tales from the Brothers Grimm'