Matters Arising from the Identification of the Body

This novella was released as an individual volume in Australia in 2017, but has only just been released in the U.S. in 2018, so it is eligible for the Hugos next year. It was a finalist for Australia's Aurealis and Ditmar Awards, and won NZ's Sir Julius Vogel Award.

Colony life on Titan is harsh and unforgiving, but the people who live there have made a civilization, with mass transit and manufacturing and leisure activities. But like all civilizations, people are stratified by income and assets -- wealthy, middle-class, and poor -- and this is reflected in the way that laws are enforced and privileges are apportioned.

Titan is still very much a wild frontier, so any time there's a death, it is investigated by professionals who determine what happened and why, and figure out how similar deaths can be prevented in the future -- whether by improved safety equipment and protocols, or by better methods to identify and assist people who are experiencing medical or psychological difficulties.

Thus, when the 20-year-old daughter of a wealthy industrialist walks out of the dome's airlock onto the surface of Titan and deliberately removes her helmet, suffering a prolonged and painful death, an investigator is assigned to figure out why. But she soon faces puzzling and obstructionist behavior by the young woman's parents, coupled with reports of strange behavior by the victim from her friends, and inconsistent data about what actually happened -- and suddenly, random incidents and "accidents" which threaten the investigator's life.

There are enough clues sprinkled throughout the narrative that I had 90% of the solution figured out by halfway through. But the worldbuilding is so interesting that there was never any question of reading all the way to the end, especially for the 10% that I didn't see coming.