Some ancient powers were never meant to awaken.

The supernatural war has erupted into the open. Across the globe, stunned news anchors report on phenomena they cannot explain—angelic sightings, demonic attacks, and battles that defy the laws of physics. As governments scramble to respond and religions grapple with vindication and terror alike, humanity faces a truth both wondrous and devastating: they were never alone in the universe.

But this revelation pales against what comes next.

At an ancient monument revered across civilizations, the demon lord Sarathiel conducts a final, catastrophic ritual. His goal: to awaken the Abyss Herald—a primordial entity that predates even the creation of angels, an embodiment of chaos so powerful that neither Heaven nor Hell could contain it. What Sarathiel cannot control, he intends to unleash.

With the traitor in Heaven's council exposed but the damage already done, Aurelia faces her most impossible mission yet. Heaven itself stands divided—some archangels call for her execution, others recognize the truth in her warnings. To have any hope of stopping the Abyss Herald, she must unify both her earthbound coalition and the fractured celestial armies.

In a desperate gambit, Aurelia plans the unthinkable: a return to Heaven itself. Through a hidden dimensional gate in an ancient temple, she will confront the highest powers of the celestial realm, armed with evidence of betrayal and the urgency of impending apocalypse. The risk is absolute—instant execution or imprisonment for eternity.

Cassian's devotion knows no bounds as he stands beside her at this crucial juncture. Before the archangels and the assembled hosts, he publicly declares his allegiance to Aurelia above Heaven's rigid hierarchy, willing to sacrifice his celestial birthright for the greater good—and for love. Their spiritual bond, deepened through battles and quieter moments of vulnerability, evolves into a rare "soul resonance" that amplifies Aurelia's powers and becomes their greatest weapon.

Even as some angels join their cause and human authorities reluctantly form alliances with these "celestial refugees," the first tendrils of ancient darkness breach our dimension. The awakening begins—reality itself trembles as the Abyss Herald stirs from eternal slumber. Demonic storms ravage cities across continents, consuming everything in their path.

Heaven, Hell, and Earth now stand at the precipice of final judgment. And at the center of it all: two angels whose love defied divine law, only to become the last hope for all creation.

When darkness older than time itself awakens, what light can possibly stand against it?

HERALD OF THE ABYSS delivers the penultimate chapter in the  Seventh Heaven War saga. Perfect for fans of epic celestial conflicts like those in Rebecca Yarros's Empyrean, Cassandra Clare's Shadowhunters, and readers who crave apocalyptic fantasy where forbidden love becomes the ultimate power against cosmic darkness.