I don't really have anything to add, I just love this book. I searched for "The NeverEnding Story" in this community, saw that there was no post about it and wanted to fix that :).
I have the edition this picture is from in my shelf, my father handed it down to me when I was a kid. It's a gorgeous edition, each part of the story is printed in a different color to represent which world it's taking place in, I wish more books tried to experiment with the style a little bit. By the way, both links in your post lead to two different Spanish editions, mine is the one from the second link.