The least human character in All Systems Red is also the most human. A half-robotic creature (or maybe more than half) privately calls itself Murderbot, and it’s got a good reason to. All the humans around it consider it just another security android, which is fine by Murderbot; it’d rather watch bad TV than have to interact with humans.
A ship, powered by a tame black hole, is on a multi-million year mission to place wormholes throughout the galaxy, allowing humans to travel interstellar distances. The people on this ship are awoken by an AI for a couple days every ten thousand years or so to create these wormholes.
The people on board the ship discover something’s not right. But how do you solve anything when you’re in cryosleep for thousands of years at a stretch?