26 Monkeys, Also The Abyss
I'm completely fucking serious. It's so good, and I don't even read sci-fi. It's so good, it makes me think to forget even trying to write short stories. It's so good it will make you really happy just to read it, if not tear up a couple of times, if you're at all like me.
It's so good that it's made me post twice in one day. This does not happen often.