Nightflyers — George R.R. Martin

Nine misfit academics on an expedition to find the volcryn, a mythic race of interstellar nomads, and the only ship available for the strange quest is the Nightflyer, a cybernetic wonder with a never-seen captain...

Nine innocents are about to find themselves in deep space, trapped with an insane murderer who can go anywhere, do anything, and intends to kill them all...