Leviathan Falls by James S. A. Corey

The ninth and last book of the Expanse series. The crew around Jim Holden, Naomi Nagata with their crew on the salvaged Mars navy ship Rocinante. Space fights, galactic politics, aliens and even more scary aliens that do not follow the rules of physics and live outside of space-time.

These series has some of the best sci-fi books I’ve ever read, I cannot recommend this enough.