The 2nd book in the }Expanse{ series; this is the sequel to }Leviathan Wakes{. Earth and Mars have reached a peace; but then a single super-soldier attacks on one of Jupiter's moons; reigniting the war For someone who didn't intend to wreck the solar system's fragile balance of power; Jim Holden did a pretty good job of it. While Earth and Mars have stopped shooting each other; the core alliance is shattered. The outer planets and the Belt are uncertain in their new - possibly temporary - autonomy. Then; on one of Jupiter's moons; a single super-soldier attacks; slaughtering soldiers of Earth and Mars indiscriminately and reigniting the war. The race is on to discover whether this is the vanguard of an alien army; or if the danger lies closer to home.