Silver Gravity Books

Herald of the Abyss: The Seventh Heaven War Series Book 6 - Avarin Voss

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Romance, Family, Travel, Fantasy, War, Religion & spirituality, Supernatural, and Action & adventure

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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.

ABOUT THE SERIES

The Seventh Heaven War Series

When Heaven falls silent, an exiled angel must rise.

In this gripping urban fantasy thriller series by Avariin Voss, the lines between celestial order and earthly chaos are shattering. The Seventh Heaven War Series follows Aurelia, a once-elite angel cast down to Earth with no memory of her fall—and a storm of divine secrets in her wake. As the modern world faces a surge in demonic unrest, rogue angels, and rising cults, Aurelia must unravel a celestial conspiracy hidden within the halls of Heaven itself.

Set against the backdrop of global cities, high-tech warfare, and spiritual warfare, this series weaves together forbidden love, divine betrayal, and supernatural resistance in a heart-pounding race to prevent the annihilation of Earth. Fans of Supernatural, Angels & Demons, Shadowhunters, and Heaven vs. Hell mythologies will be hooked by this epic battle between grace and darkness.

SERIES READING ORDER

The Seventh Heaven War Series by Avarin Voss

Book 1: Fallen Grace

Book 2: Shadows in the Streets

Book 3: Wings of Devotion

Book 4: Chains of Betrayal

Book 5: Storm of Seraphs

Book 6: Herald of the Abyss

Book 7: Eternal Ascension

READ A SAMPLE

Book in production.

Meet the Author

Avarin Voss writes high-octane urban fantasy where ancient myths, secret orders, and celestial wars collide with the modern world—and where love is never a side plot. She specialises in reimagined mythology and romantic thrillers, creating stories about fierce, complex women who discover their divine heritage while up against conspiracies, prophecies, and enemies who’d rather see the old gods—or Heaven itself—take control again.

Her interconnected universes include The Daughters of Zeus—a myth-infused thriller saga that follows the modern Muses as they take on a shadowy Titan cult—and The Seventh Heaven War, which centres on an exiled angel caught in a celestial cover-up that spills onto city streets. In every book, Avarin blends Greek and biblical mythologies with high-stakes adventure, slow-burn or forbidden romance, and emotional payoffs that hit as hard as the magic. She’s passionate about putting powerful women at the centre of supernatural conflict—women who lead, love, fight, and choose their own destiny.

When she isn’t sending her heroines into temples, archives, and underground cults, Avarin is usually researching obscure myth, visiting archaeological sites, or mapping out the next series in her ever-expanding world of divine legacies, secret societies, and the dangerous kind of love that changes the course of history.

Tropes You'll Love

Exiled angel with missing memories uncovers a celestial cover-up while demons flood modern cities — with forbidden romance, heavenly politics, and escalating supernatural war.

Angel / Celestial Tropes

Fallen/Exiled Angel Heroine – she was powerful in Heaven, now she’s on Earth with gaps in her memory and an unfinished mission.
Heaven vs Hell (but murky) – not everyone in Heaven is good, not everyone below is evil.
Celestial Conspiracy – a cover-up inside Heaven itself; someone erased the truth.
Lost Grace / Broken Wings – she has to regain power, status, or memory.
Rogue Angels + Renegade Orders – angels who don’t follow the Choir, splinter groups acting on their own agenda.
Prophecy / Heavenly Decree – she’s at the centre of something foretold.

Urban Fantasy / Supernatural Thriller Tropes

War in the shadows of modern cities – London rooftops, New York cathedrals, abandoned subway churches.
Demonic unrest on the rise – something has weakened the veil.
Human institutions as puppets – cults, secret societies, maybe even government arms aiding celestial powers.
Race-against-time to stop an apocalyptic ritual – classic climax structure.

Heroine & Identity Tropes

Amnesiac/erased past heroine – “Why was I cast down?” is the emotional engine.
Once-elite, now fallen – competence porn + vulnerability.
Chosen-but-betrayed – Heaven chose her, then discarded her.
Found Purpose on Earth – she builds a new family/team to replace the heavenly one.

Relationship / Romantic Tension Tropes

Forbidden / cross-faction love – angel + human, angel + fallen, angel + enemy agent.
“I was sent to watch you” → “I can’t hurt you now.”
Partners-in-battle-to-lovers – fighting demons together, sharing grace, patching each other up.
Duty vs Desire – she’s meant to save the world, not fall in love with it.

Power & Progression Tropes

Slow power restoration – each book unlocks a new celestial ability.
Relics / sigils / heavenly tech – artefacts that only an angel can use.
Levelling up to face bigger foes – demons → fallen generals → the actual heavenly traitor.

Series-Level / Epic Tropes

The war no one on Earth knows is happening – hidden spiritual warfare.
Heaven isn’t what you were told – corrupt choir, political archangels.
“Heaven has gone silent” mystery – why? who cut the line?
Final book = return / reckoning / restoration – she goes back not as a servant, but as a challenger.