He has hunted monsters for 2,600 years. He thought he knew what was coming.

He was wrong.

In 586 BCE, Celtic warrior Cian mac Morna received a sword, a commission, and a secret that would only be revealed when the world was ready for it. Twenty-six centuries later - having survived the Fall of Jerusalem, the Black Plague, and every war in between - the sword finally speaks.

The Two Witnesses of Revelation are returning. Cian is their Guardian. And the ancient enemy has spent five thousand years preparing for exactly this moment.

Deep in the Cydonian plains of Mars, orbital imagery has revealed something that should not exist: a sigil carved before the Flood. The mark of an oath sworn by two hundred fallen angels before they destroyed the ancient world and were imprisoned in chains of darkness. An oath that was never meant to be found.

But Naamah found it first.

She has many names across many centuries. The Watchers called her their queen. Scripture calls her the Whore of Babylon. And she has spent five millennia building the infrastructure for their release - corrupting bloodlines, cultivating power, and waiting with inhuman patience for the one thing she still needs: the key to the Abyss.

Now a private Mars mission is racing toward Cydonia. The sword Cian carries is made from the same ancient ore as the chamber on that red plain. And somewhere in Eden, the prophet Elijah has been waiting - sustained by the Tree of Life - for the hour of his return.

The chains are weakening. The oaths are stirring. And Cian mac Morna - 2,631 years old, deeply scarred, and constitutionally incapable of following orders he disagrees with - must prepare for a war that scripture promised was coming but no one believed would arrive in their lifetime.

It has arrived.

THE CYDONIAN OATHS is the first volume in The Nephilim Chronicles - a five-book biblical apocalyptic thriller drawing on 1 Enoch, the Book of Jubilees, and the prophecies of Revelation. For readers of Frank Peretti, Joel C. Rosenberg, and anyone who ever wondered what really happened before the Flood.

The outcome of the war was decided at Calvary.
The final battle begins now.