A hammer is made for one thing

Captain Thatcher, the Hammer himself, wages a desperate fight for survival against his most bitter enemy.

In the battle for humanity's future against Simon Moll's swarming fleets, Thatcher reaches inside himself and finds a willingness to do anything it takes to win.

Anything. It. Takes.

Long-held principles disintegrate as massive fleets clash in the darkness of the void. But while sudden changes of heart can win short-term tactical victories, what will be the cost to Thatcher's soul? Or those of the crews under his command?

Long-sought vengeance may yet be had in the star cluster's southern reaches. But a reckoning looms on the horizon, the likes of which no one fighting has begun to fathom.