Mimicking of Known Successes

The world building here doesn't fundamentally make sense, there's no universe in which building 200,000 mile rails to colonize Jupiter is more feasible in terms of knowhow or resources that fixing Earth or even colonizing the Moon or Mars. However, you owe it to the author to suspend disbelief on the central premise and go for the ride. The worldbuilding about all the heat and light coming from gas flames was so good it felt like it was the initial idea that the setting formed around.

The strengths were the worldbuilding and the formal language that made everything feel retro-futuristic.

The primary weakness, in my view, was that a good mystery often involves a unique or creative "perfect crime". In order to write a perfect crime, you have to work within the rules of the real world. If your perfect crime involves a creative interpretation of a fictional world, the rules you yourself made, it feels less clever. As an example, there's a reveal that a suspect had a creative way of riding the train. This didn't really feel like anything to me because the author hadn't previously established how people normally ride space trains.

There wasn't a lot to the love story, but I am guessing it will build in later installments.

I liked it and thought it was very funny that "conservative" is a swear.

Impressed by the author's use of this story to discuss a particular issue... Revealed only at the end.

It was interesting, but never compelling, with an ending felt like the author was trying to get out of the office on a Friday. Neat world though, would maybe like to see a sequel.

Imaginative setting with a steampunky feel to it. I liked all the travelling around on railcars. It's quite a page turner. But the characters felt a little distant despite the first-person perspective. Perhaps a tad too short. I'd love to read another story set in the same world, though.

This book was a lot of fun and definitely my favorite Malka Older book so far. Out of everything, I enjoyed the worldbuilding and the slow romance the most. The world has very retro-future 19th century vibes, complete with Jupiter's fog misting, atmoscarves, gas heating, and railcars between floating platforms. This world and the characters were so much fun.

My one quibble is that I found some details of the mystery a little weak (although this may be my own expectations for what I want out of a mystery) but I will put those spoilery details in a separate comment.

The setup of the book is that Mossa the Investigator enlists Pleiti (an old university friend, and ex) to look into the disappearence of a man from a remote platform. Pleiti is a scholar of classics, which here stands in as "studying past Earth so that future Earth and its ecosystems can be rebuilt perfectly". I love the connection here of her studying both the failure of Earth but also the failure of her past relationship with Mossa. The title drop during the book's conclusion bringing everything together is just chef's kiss

(Finally, an unrelated aside, but I YELLED when these two went out for dinner at a thematic wood-burning restaurant named Slow Burn.)

I don't think I've ever had a book smack me over the head with the theme quite like this did, "It was right there in front of you the whole time, in the title even, how did you miss it?!" Anyway, as a story, the characters and setting, it was quite enjoyable, the mystery aspect was less well constructed as far as mysteries go, imho. Fans of The Locked Tomb would probably enjoy this quick read.