In reading that page, I was super taken in and immediately wanted to get a copy of the collection; trying to follow the links left me sad to realize it's a fictional story, but it's an amazing piece of fiction none the less.
Yeah, it reminded me of the Three-Body Problem... "hard" science fiction that's believable as an extension of what we currently know
That would be a great, and terrifying at the same time, first contact response message to us.