Maisewith Goes to War: Book 3 of the Maisewith Four-Book Series

Maisewith Reems was adopted in infancy for experimental purposes by an ambitious couple who were trying to combine AI control with humans. After many years and many brain surgeries, Maisewith was deemed a failure, discarded, and left for dead on a distant moon when she was eighteen. After surviving inside a geodic cavern, she was rescued by beings from the planet Progcht. Having learned what her parents had done to her and others, she and her sister wish for revenge.
When her mother infected Maisewith's former nanny with a virulent parasite and sent her to Progcht, it spread quickly, infecting other humans and Progchti citizens. Unless a cure is found, to stop the deaths, Maisewith's mother, Jadith Reems, will succeed in wiping out the population and moving in to claim Progcht as her own. Maisewith convinces the Progchti government to send her and her sister to Costra, the planet where they grew up, and where her mother reigns as tyrannical dictator.
Her mission is to find the antidote for the parasite and bring it back. Her secret goal is to kill her evil mother, but first to see her suffer as much as Maisewith's nanny did. The government arranges a disguise and transportation. They will go as Jalsparians, the golden furred natives of Jalspar. The Jalsparian crew will go with them in the restored spaceship on which they came to Progcht. After landing on Costra, their plans must change, as the pills prescribed to keep their disguise from fading are stolen.
They soon find themselves on the run, instead of confronting the enemy disguised as tourists. Maisewith and her friends' find unlikely allies in the displaced natives of the land. The Bzorks, gentle giants who were nearly wiped out and chased to the forests and mountains of the far north, take them in, hide them, and become their friends.