James S.A. Corey – Abbadon’s Gate: The Expanse, Vol. 3
The best of the series so far. The protomolecule that was the major plot axis of the first two books forms a 1,000 km-wide ring between Uranus and Neptune’s orbits. The space inside the ring seems to be some kind of wormhole leading to a million-kilometer wide space with more than a thousand other rings spread along its edges. Earth, Mars, and the Belt waver between war and peace, both inside and outside the ring space. Protagonist James Holden and his crew, along with a few other characters try to keep the peace, and try to ward off a vengeful character whose father and sister figured prominently in the first two volumes. The drama of a continually worsening situation keeps building and building, with some elaborate physics involved—gravity and inertia turn out to be excellent plot devices. The final battle scene is fantastically done—one of the best I’ve read.