Station Eternity by Mur Lafferty
I have a soft spot for mysteries with a sci-fi backdrop. Mallory is one of those people, like Angela Landsbury or any cozy mystery sleuth, who just seems to attract murders. She almost always helps the cops solve the crimes, but she's tired, her family hates her, and she can't keep friends - no one wants to risk being the next corpse. She seeks refuge on Station Eternity, a sentient space station populated by aliens, a station that doesn't allow humans aboard. Well, that's not strictly true. There is a human ambassador and there's also Xan, who is hiding out under rather unusual circumstances. But more people are on their way.
When the shuttle carrying a human shuttle is almost docked at the space station, the space station, the shuttle, and Mallory's life explode into chaos. Several humans and at least one alien are killed in separate, but probably related events. The station's in turmoil, Mallory's vacillating between wanting to solve...