The Little Prince
Comments and mentions from HN threads:
Ask HN: What books fundamentally changed the way you think about the world?
Ask HN: Which non-technology book has influenced you the most and why?
ssijak: Read it a few times in my life. As a child, teen, adult and always got different but beautiful things from it.
AngeloAnolin: Always have had a profound impact on how I view and understand things. Read it with an open mind like a child and see the wonders.
Ask HN: Books you wish you had read earlier?
feignix: Again, a very touching, charming book about a little kid's world(universe?) view, told through his adventures.