I don't think I have to say much about Black Beauty. I'm sure most of you have seen one of the film adaptions (the 90s version is one of the few films, where Sean Bean doesn't die, btw).
It's a beautiful story about a horse and its many owners and fellow horses. If you haven't seen one of the movies, watch one, if you haven't read the book, read it. It's worth it. And if you don't know who Black Beauty is, you're lame.