HEART OF OBSIDIAN: A Dark Monster Romance (Legacy of the Colossus #5)

The surface is a frozen graveyard. The deep is a molten trap. And he is the god of the mountain.

For three years, I’ve survived the permafrost by scavenging scraps of heat and breathing through a rusted scrubber. But when I break into a forbidden cavern to steal a thermal core, I don’t find a stone.

I wake a King.

Thane is a nightmare of midnight-black armor and liquid fire. He doesn't just want the thief who trespassed on his altar—he wants the female who smells like the first thaw in a millennium.

Now, I’m trapped miles beneath the ice in his geothermal nest. He’s stripped away my survival gear, flooded my lungs with his own burning breath, and marked my womb with a permanent, glowing heat.

My body is no longer human. It’s mutating to accommodate his size, his density, and his catastrophic thermal radiation.

I came to the deep to save my village. But I’m staying because the monster who unmade me has made me the Mother of his volcano.

And I have never been warmer.

Reader Heart of Obsidian is a high-heat, standalone monster romance within the Legacy of the Colossus series. It features extreme size difference, biological body transformation, and explicit breeding/oviposition themes.