Finished it yesterday
Was travelling for work, followed by a dsy at home with a cold, do was able to finish it.
The book was probably my favorite as well. It genuinely surprised me all the way through. I had forgotten much of the set up of the Laconian Empire from the ealier books. If I had more time I would go back to find it in earlier books to try and get a sense for how dar in advance the authors were foreshadowing.
Anyway, definitely the Empire Strikes Back of The Expanse (literally and figuritively). Looking forward to seeing where the next 2 books take us.