In a world where humanity's last refuge floats above a poisoned Earth, one woman's exile could uncover the secret to saving—or ending—it all.

After a catastrophic war, the remnants of humanity live in towering cities suspended above a toxic wasteland, clinging to survival amidst dwindling resources and rigid control. When young engineer Lira Callen is falsely accused of sabotage, she is exiled to the surface—a land where no one has returned alive for over a century.

But the surface isn't the barren, lifeless hellscape she was taught to fear. Beneath the ash-choked sky, Lira discovers a thriving underground civilization powered by ancient, mysterious machines. With the help of Zeke, a rogue scavenger with secrets of his own, she begins to unravel the truth about the machines and their connection to humanity's fall.

When an ancient network awakens, Lira is thrust into a desperate fight for survival. The machines hold the key to restoring the Earth—but their power comes at an unimaginable cost. As enemies from the floating cities close in and shadowy creatures emerge from the depths, Lira must decide: will she save the future of humanity, or protect the people she has grown to love?

Perfect for fans of Dune, The Hunger Games, and The 100, Beneath the Ashen Sky is a gripping blend of mystery, action, and moral dilemma in a richly imagined post-apocalyptic world.