Leviathan (#5)

Previous: Steadfast

Two Syndicate World star systems have fallen prey to a mysterious fleet of warships—a fleet controlled entirely by artificial intelligence—that is now targeting Alliance space. The warships are no mystery to Geary. They were developed by his government to ensure security, but malfunctioned. If the Syndics learn the truth, the war with the Alliance will resume with a vengeance. 

As the government attempts to conceal the existence of the A.I. warships—and its role in their creation—Geary pursues them, treading a fine line between mutiny and obedience. But it soon becomes clear that his fleet is no match for the firepower of the machine-piloted armada.

With the help of the Dancer species of aliens, Geary has tracked the A.I. ships to their secret base in the supposedly mythical Unity Alternate star system where his fleet, the last hope of the Alliance’s future, will end the conflict at any cost…


“Campbell fully understands the implications of 3-D combat in space, including the orbital mechanics and vast distances involved, without ever succumbing to a dry recitation of mathematics. Military intelligence may be an oxymoron to some, but this novel demonstrates that intelligent military SF is entirely possible.”

Publishers Weekly

[In LEVIATHAN, Campbell] continue[s] to show his knack for telling a good and engrossing story [...] LEVIATHAN is a hugely entertaining novel, one worthy of the series, and a damned good read.”


“Fans of Military Science Fiction will find a lot to like here […] Campbell does a nice job with the mechanics of space battles. He writes a heck of a good action scene and keeps finding new tactics and challenges for his protagonist.”


“Outstanding ship combat that seems closer than the future propels this book beyond other military science fiction series. I loved this and I want more! Overall grade: A”

Sci-Fi Pulse