Jonathan Livingston Seagull

I've read this one when I was a teenager - I didn't remember much other than the fact that Richard Bach becoming my favorite writer for a while with this book.

And reading it many decades later was such an amazing experience hence I can't rate anything but five star. I'm adding couple of his other books to my to-read list.

Short and magical story. What you will take away from it will depend on your spirituality maturity :)