Just finished Abaddon's Gate.
The final book in The Expanse series - this story finishes off what was begun in Leviathan Wakes. James Holden and his crew remain core characters with a revolving door of minor characters all essentially grappling with their own ideas about how humanity should act now that they have encountered alien life. While the plot is far from original, I still find the strength of the series has rested almost entirely on the prose and the exceptionally thorough understanding of low gravity and its effects on humans. The weaknesses of the story, as usual, lie in the formulaeic approach to the novel (reading the introduction to the new minor characters was a little tiring this time)
The final book takes a few turns towards the metaphysical, but remains blisteringly quick, entertaining and enjoyable. Not as strong as Leviathan Wakes, but easily as good as Caliban's War.