LEVEL ZERO: A Dystopian Sci-Fi Thriller: The Last City on Earth and the Lie That Kept Us Underground

LEVEL ZERO: A Dystopian Sci-Fi Thriller: The Last City on Earth and the Lie That Kept Us Underground

by Nora Callum

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Last checked: May 24, 2026

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Fans of these authors will like this...

  • Hugh Howey
  • Veronica Roth
  • Marie Rutkoski

Fans of these books will like this...

  • Silo
  • Divergent
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Perfect for you if...

  • You love dystopian thrillers with a protagonist forced to question everything they've been taught about survival and authority.
  • You're drawn to stories where the real conspiracy isn't monsters or plague, but the people in charge hiding what's actually possible.
  • You want high-stakes tension paired with genuine mystery. You need to know what's really on the surface and whether Kael can expose it before the General shuts her down.

Maybe not for you if...

  • You prefer slower-burn character development over plot momentum. This book moves fast and asks readers to keep pace.
  • You need your protagonists to be morally grey antiheroes. Kael is sympathetic and fundamentally good, even as she breaks rules.
  • You've had your fill of underground bunker stories and want something with more varied settings or a different core concept.

About this book

In Vault City, a sprawling subterranean complex, humanity has survived for eighty-one years beneath a poisoned surface world inhabited by creatures called Ferals. Life underground depends on recycled air, synthetic light, and the absolute authority of the General. Kael, daughter of the high command, has always followed the rules that maintain order in the vault. But when she discovers a scratched message from her brother—whom she was told died a hero—her certainty begins to crack. A hidden map and forbidden frequency lead her to uncover that the monsters aren't only on the surface. They walk the corridors of Level One, conducting "reassignments" from which no one returns. Searching for the truth about her brother's disappearance, Kael descends to Level Nine, the lawless depths where the forgotten and rebellious are cast aside. There she learns that the surface isn't a graveyard but a prize the elite have kept for themselves. With help from a disgraced prisoner and a technician with dangerous knowledge, Kael must navigate betrayal and surveillance to broadcast the truth to the thousands living in darkness. But the General will do anything to keep the door sealed.

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#3,002#1,084,877#2,166,752Apr '26Apr '26Apr '26Apr '26

Currently around #2,104K in the Kindle store — a niche title. Sales have softened 160% recently.

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Nora Callum

1 book on Vagrant Press

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