Katya and the Young God by Alessa Winters

Katya, exiled from her work and her friends, is forced to face down with her worst enemy…and forced to team up with him to save her own life.

Pieter, alone in the Colorado wilderness with only his waning powers and an overly friendly Husky, must figure out who to trust, and who he can rely on in order to protect those he needs to keep safe.

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After helping her friend partially take down the Organization, Katya is sent to the middle of Colorado with the mission to investigate a mysterious power source in the heart of the Rocky Mountains. It’s a demotion, it’s a far cry from what she’s used to, and it’s an insult to her long history of work.

But the very group she’s sent to investigate includes her worst nightmare – Pieter, the remaining demigod twin, who tortured her and almost killed her friend. He’s changed: beaten down, his power significantly diminished, but he holds the key to unlocking the mystery buried deep under the mountain.

They embark on a treacherous journey into a deep cave, animosity turns to a begrudging trust, as the rest of the group quickly unravels into warring factions. For while they’re under this mountain, while they’re unlocking the mysteries of a buried ancient horror, their only chance at survival is relying on each other.