This was a volume of Grimm Fairy Tales, illustrated by Maria Pascual, which the client read in her childhood and she had a lot of affection for it. The front cover was lost and there was no cardboard spine.
After an Internet search, I found an image of the cover (the best I could find), and after printing it and laminating it to give it the typical brilliance of these books, it became part of the covers that again protect their princesses, princes, fairies and elves.