Battleship: Leviathan Books in Order

Major Declan Payne boards an ancient warship near Earth while humanity struggles against the Blaze Collective. Discovering the vessel is still alive gives his small team a possible advantage, but its own purpose makes their partnership far from straightforward.

Leviathan advances into Vestrall space to attack the enemy sustaining a thousand-year war. Meanwhile, Major Payne tries to turn their allies against them, seeking a peace that depends on destroying the Vestrall's ability to keep the conflict alive.

Leviathan and its human companions pursue the Vestrall, the force supplying the Blaze Collective with weapons and direction. A journey deep behind enemy lines leads to a biomechanical civilization whose resistance conceals knowledge critical to the wider war.

The Ga'ee prepare to return with an immense armada and millions of drones, threatening life across the galaxy. Earth Fleet must unite seven races while Declan Payne and his team take Leviathan into a conflict decided by desperate human choices.

Alien forces seize worlds on the edge of Berantz space, and an Earth Fleet armada vanishes while investigating. Retired Declan Payne must persuade the equally retired Leviathan to respond as a new invasion threatens the peace they fought for.