The Mercury Rebellion: The Solarian War Saga, Book 3 (Unabridged‪)‬

Stranded on the hottest planet, she's got the job assignment from hell.

Bruised by tragedy, Space Corps agent Elfrida Goto accepts an assignment on Mercury, the factory of the solar system. But she's soon swept up in an election that could lead to the evacuation of the planet's colonists. Elfrida is torn between doing her job and supporting the colonists, who've built a vibrant underground world. When violence threatens, Elfrida turns for help to a reclusive local corporation that's hiding a terrible secret.

An alliance with criminals seems like a small price to pay, but it's not enough to stop a glamorous but malevolent candidate from stealing the election. Now the price of peace will be even higher. As violence engulfs Mercury, Elfrida confronts the evil power that would drive humanity out of space forever. And on a planet where sunlight itself is fatal, she has zero room for error.