Due to Amazon's rules regarding inclusion in the Kindle Unlimited catalogue, book four has been removed from Royal Road. If you want to read it, you can do so on Dec. 24, 2024 at the link above. The synopsis is:

  

  Viral, extraterrestrial nanites collectively known as the Mist have been transforming Earth and its inhabitants for nearly a century. The shapeshifting environment has wreaked havoc across the planet, changing the elemental structures of land, air, and water—and forcing every living being to endure an unnatural evolution. As animals warped into monsters and people developed superhuman abilities, the Mist also accelerated and amplified technology into tools and weapons that disrupted the world’s status quo. And while nations were plunged into chaos and war, aliens harvested Earth’s resources, leaving humanity on the brink of extinction.

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  Mira Braddock’s own humanity was sacrificed in order for her to become the world’s savior. A cybernetic soldier enhanced with a Tier 7 Nexus Implant, she’s a Mist Warden capable of manipulating the nanites inside anything and anyone, making her the most powerful and feared being in existence. Mira’s crusade against Earth’s enemies has brought mass destruction in her wake. Millions of aliens and humans have died at her hands. Each victory increases her godlike power, and she finds herself slipping away, struggling to relate to the needs of her allies—and Patrick Ward, the man she loves—as she undergoes an astounding transcendence.

  But the alien Arbiters of Orion would rather destroy the Earth outright than allow Mira to become an even greater threat to their place in the universe . . .