Star Crusades Nexus Books in Order

An Alliance expedition to Helios becomes a diplomatic crisis when its flagship is attacked and sent toward the inhabited planet. Elsewhere, a prisoner aboard a Biomech ship dreams of escape and revenge against his captors.

A spacebridge opens the Orion Nebula to Alliance explorers, including retired Marines Spartan and Teresa Morato. Discoveries of abandoned machines and destroyed civilizations force humanity to choose between abandoning new riches and confronting an unknown enemy.

Spartan's commando raid goes wrong when a Raider ship disappears through an unknown Rift with his team aboard. An expedition toward the mysterious Helios nexus follows, unaware that a centuries-old threat waits for its arrival.

Biomech invasion fleets advance into Helios, threatening every world in the system. Alliance troops and ships rush to reinforce their allies while Spartan and Teresa Morato build an unusual military force among humanity's old worlds.

As Helios prepares for the approaching Biomech War, Spartan reaches an isolated, distrustful Earth. Enemy attacks cut contact with Mars, while Teresa Morato and Admiral Churchill prepare an ambitious operation to strengthen the Alliance's defenses.

Alliance troops deploy to Eos to fight Dictator Lyssk's insurgents, placing Jack Morato amid bombings and ambushes. The campaign strains a fragile alliance that must survive if the worlds of Helios are to prepare for greater danger.

An ancient prophecy warns the Alliance of a returning enemy as revolution on Helios becomes a brutal military coup. An approaching alien fleet intensifies the crisis, forcing newly assembled troops and warships into an uncertain intervention.

The Biomechs prepare to cross the unstable Black Rift with overwhelming forces. Six allied races defend devastated worlds and battered fleets, knowing another assault could leave them too weakened to withstand the invasion still to come.

Biomech forces spread across inhabited worlds from immense fortified Arks, conducting a war of extermination. Alliance commanders gather remaining forces while Spartan and Teresa Morato seek help from an ancient race against their shared enemy.