This is a sci-fi mystery in the vein of Sherlock Holmes following Mossa, an Investigator (similar to a detective) and her old college roommate/lover, Pleiti. Mossa fulfills the cold and intelligent Holmes role, while Pleiti fills the story-from-her-POV sidekick role of Watson. We meet the two as Mossa rolls back into Pleiti's life to ask for her help in the case of a disappearance, and we learn their history as they investigate and figure out if and how they can fit back into each others' lives. 

All of this takes place on Jupiter. Rather, orbiting Jupiter. Which is just so neat. Older's writing seats us firmly in the comfort and coziness of a Holmesian mystery, but wraps it up in an interesting sci-fi premise. The mystery itself is alright; I found the writing of it very decent and I enjoyed following the threads as they put them together, but what drove this for me was Mossa and Pleiti's characterization and the world building. I don't visualize things very well (if at all) as I read, so my brain was working overtime to picture this colonized orbit of Jupiter because I wanted to learn about it so much. It was so neat! 

So, so happy I grabbed this. It felt cozy in the way that slipping into well-known and well-loved Holmes stories does, but also more stimulating with the world building.