Those two are fantastic, and if you like Vernor Vinge check out "A Deepness in the Sky" -- I think it's his best work, and is much more plausible (centered around slower-than-light travel).
Not sure that "plausible" is the word I would use - they are both set explicitly in the same universe with the same "physics" - Deepness just being a bit more subtle about it as the characters don't know about the Zones of Thought - but the Zones are central to the book and the ending.
Edit: Having said that, the concept of "focus" in Deepness is utterly terrifying - particularly as it seems very plausible and, as is noted in the book, some people might willingly submit to it (relevant to HN!).
I have a few more recommendations in that vein here: http://compellingsciencefiction.com/blog/2016-12-18.html