Shorter review: if you enjoyed Leviathan Wakes, you’ll definitely enjoy Caliban’s War (unless you are a space opera connoisseur, sensitive to the slightest details that affect a universe—but even then...)
Longer review: If anything, author duo Daniel Abraham and Ty Franck’s second entry in The Expanse series Caliban’s Wake (2012) shows the success of the first novel was not a fluke. Like Leviathan Wakes, Caliban’s War is the perfect genre beach read. Story purpose is always clear, yet often moves in organic yet unpredictable ways. The characters are on the right side of 2D, making their plight relatable. And the plotting between the character viewpoints never allows the narrative to slow, even when there isn’t any direct conflict on screen.
But Caliban’s War is not a repeat of Leviathan Wakes. It takes the characters from Leviathan (specifically Holden and crew), plucks a couple key characters from what was the background of Leviathan, puts them front and center, then evolves the wider setting to its next logical point in a story that is an equally entertaining, page-turning read.