One of the things I like about James S.A. Corey’s Expanse series is how these books focus on the crew of the Rocinante. Many hard sci-fi writers try to show how smart they are by making it obvious how much math they did to explain how their sci-fi universe works. While The Expanse certainly has these moments, they’re fit in between the human drama that follows James Holden and his crew. Trouble seems to follow them wherever they go, and in Caliban’s War, they’re pulled into a political conflict that spans the solar system.
I appreciate how an overarching plot with the protomolecule connects Leviathan Wakes to Caliban’s War. While the first book in the series took some time ramping up into having a cohesive collection of characters, Caliban’s War uses all four members of Rocinante’s crew in a new way that felt more interesting. Of course, this book also contains my favorite “character of the day” with Chrisjen Avasarala as the U.N. ambassador. Her calculated political ambitions were fun to watch as they unfolded, and she tried to keep on top of all the chaos that was happening.
Caliban’s War also benefits from plenty of action and tense moments. What could easily be confusing and hard to follow was well written and engaging. My heart was racing as these exciting sequences took the political drama and made it explode in a way that was both expected and fun to read. Ultimately, the emotional connection to the characters—both continuing from book one and exclusive to this book—is what made everything click for me in this novel. Granted, I would have liked a little more continuity between the two books by bringing over more characters from Leviathan Wakes. Still, sometimes a long-running series has to focus on bite-size stories instead of carrying a huge and unwieldy plot throughout.
An exciting, political, and action-filled hard sci-fi gem, I give Caliban’s War 4.0 stars out of 5.