Things that go bump in the dark, deep space
I'm going to tell you that I have a very low threshold for scary things. So if I say that a book freaked me out you can take it with a grain of salt. That said, The Last Astronaut, which was a bit of Alien, a bit of The Martian and some Major Tom vibes thrown in, made me read with one eye closed for the latter half of the book as the creeping dread of the unknown grew.