Where The Ashes Find Their Grave by Alanna Rusnak

Rajiv Montgomery Noah spent his life building a sanctuary for the worthy. He chose two hundred souls, wrote them a constitution, and sealed the gates against everything that burned. On paper, it was beautiful.

But a house built on a cracked foundation will always find its fault line. Inside Eden, a man with a borrowed name carries old world appetites into the new one. The batteries are draining as the sun refuses to show her face—and the only man who can see her is trapped four hundred kilometres above the earth, utterly beyond reach. And beneath the surface of Rajiv's perfect system lies a catastrophic secret—one he buried before the fires came—that may render everything he built, every sacrifice, every soul he saved, meaningless.

Beyond the dome, the silence may not be as total as they feared. But even the fragile hope of other survivors only sharpens the questions Rajiv can no longer avoid:

What does it mean to save humanity if you have already broken the thing that makes it human?

There is only one answer. And it will cost him everything.