Description
Beneath the Sahara lies a city no map admits exists.
Following an impossible signal discovered at the end of The Ghost Element, Nova Vale and Rook Mercer join a carefully controlled expedition into the Azel Basin.
The mission is supposed to investigate underground water and unidentified archaeological structures.
Then the desert begins to breathe.
A sealed passage opens beneath the dunes. Warm air rises from below. Lights move inside the darkness. And a human voice speaks from beneath the sand.
Far below the surface lies Asha—a vast, living city containing farms, reservoirs, railways, forests and an artificial sky controlled by an ancient system called Lumen. Generations of people have lived there believing that their protected world contains everything humanity needs.
Asha’s citizens move through carefully defined Life Circles. At sixty, each person undergoes the Passage, leaving their family to serve in a distant settlement from which no one returns. Dangerous technical and historical knowledge is held inside the Whole Memory, accessible only to senior Stewards who decide what each generation is allowed to know.
Nova immediately questions the city’s maps, boundaries and missing histories.
Rook discovers that the systems maintaining its air, water and artificial daylight are beginning to fail.
As reservoirs fall and the false sky cracks open, the people of Asha learn that the surface is real. At the same time, Nova and Rook uncover evidence of another hidden city, separated generations and a network of ancient continuity chambers extending far beyond the Sahara.
Contact with the surface brings new dangers. Governments claim territory. Archaeologists demand access. Technology companies calculate the value of Asha’s systems. News spreads before the people below have decided whether they want to become a global discovery.
Then Asha’s preservation system activates its final defence: erase unstable knowledge, restore the old history and close every horizon before the truth can escape.
Nova and Rook must help two divided cities reconnect, repair an underground climate system and stop centuries of memory from being deleted—without replacing one form of control with another.
Should dangerous knowledge be destroyed, hidden or shared?
And who has the right to decide what an entire civilisation is allowed to remember?
The World Below is the spectacular fifth and final novel in the Nova & Rook: Ground Truth Adventures series. It combines archaeological mystery, underground exploration, science fiction, survival, first contact and powerful questions about freedom, memory and the ownership of history.
Perfect for readers aged 12–16 who enjoy lost civilisations, secret worlds, artificial environments, ancient technology, dramatic discoveries and adventures filled with moral choices and unexpected twists.
The city’s artificial sky and restricted archive are central to the story: Asha’s institutions preserve technical and historical knowledge inside the Whole Memory while preventing those affected by omissions from inspecting the reasons behind them.
Author: Eric Henry
Series: Nova & Rook: Ground Truth Adventures — Book Five and series finale
Recommended reading age: 12–16 years
Length: 387 pages
ISBN: 978-1-0669226-0-4
Publisher: Questbound Studios Limited
Interior: Illustrated novel with black-and-white maps, city diagrams and technical illustrations.
Details
Publisher - Questbound Studios Ltd
Language - English
Perfect Bound
Contributors
By author
Questbound Studios Ltd
Published Date - 2026-08-24
ISBN - 9781066922604
Dimensions - 19.7 x 13.2 x 2.2 cm
Page Count - 387
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