Blindsight by Peter Watts
Very strong hard sci-fi with mind-bending approach to the question of conscience. And vampires (not the Twilight kind, the scary kind).
Someone posted this on a previous book list and I read it and I'm so glad I did, now I've read Echopraxia, and I've bought all his other books and I'm on those as well, totally awesome. I still think about this series and the vampires and hive minds.
https://www.goodreads.com/book/show/48484.Blindsight
Fair warning: it's kinda pessimistic on the future of humankind.
If you like it, proceed to Echopraxia. More hard sci-fi, more vampires, even worse news for humankind.