Primegen: The Final Selection

When Earth begins to fail, the government creates Primegen, a solution: a new generation, specially trained, genetically strengthened, and prepared to survive beyond the planet. Families believe their children are being educated to save humanity.
They have no idea what's actually being done to them.
Zaria and her little brother were among thousands taken - tested, monitored, experimented on without consent, reshaped into whatever Primegen needed.
Only Zaria ever trusted her instincts over the government's lies.
So when the first shuttle launches - carrying her brother into space - her gut twists harder than ever. Something isn't right. And she isn't imagining it.
As Zaria uncovers pieces of a truth too dangerous to speak aloud, three others rally around her. Together, the Core Four step into the shadows Primegen never meant them to see. Their mission becomes impossible and unavoidable:
Save the kids, expose the truth, possibly fall in love, and stop Primegen before they end all hope of saving Earth.
The first shuttle might be heading upward...
but if Zaria's right, humanity's future is collapsing fast.