EXTINCTION INTERVAL GET THE BOOK
A NOVEL BY J.A. HALSTEAD

THE PAST
IS NEVER
SILENT.

What if humanity's greatest monuments were built not to honour the dead, but to warn the living?

A speculative archaeological thriller about forgotten civilisations, ancient mysteries and a warning buried beneath the sands of Egypt.

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SOME PATTERNS WERE NEVER MEANT TO BE FOUND.
EXTINCTION INTERVAL by J.A. Halstead book cover, showing a golden pyramid beneath a glowing symbol and star-filled sky
01 / A WARNING THROUGH TIME
THREE ANCIENT CIVILISATIONS✦ONE REPEATING PATTERN✦A WARNING FOR OUR TIME
01 — THE STORY

SOME SECRETS
SHOULD STAY BURIED.

For twenty thousand years, a secret has remained buried beneath the sands of Egypt.

When Ethan Cole, a gifted but reclusive patternist, discovers an anomaly hidden within an ancient artefact, he uncovers evidence that challenges everything we believe about human civilisation.

His discovery brings him to Cairo, where archaeologist Layla Hassan is investigating secrets connected to her family's past. Together, they uncover something extraordinary beneath the Great Sphinx: evidence of a forgotten civilisation, an ancient technology, and a warning preserved for thousands of years.

But they are not the first to recognise the danger.

Across three ancient civilisations, separated by millennia, others witnessed terrifying changes in the heavens. Some tried to understand what they saw. Others sought to destroy the evidence.

Now the pattern is repeating.

As powerful forces move to suppress their discoveries, Ethan and Layla must decipher humanity's oldest warning before a catastrophe threatens everything they know.

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02 — ECHOES OF THE PAST

ACROSS MILLENNIA.
THE SAME SKY.

Three ancient settings. Three civilisations confronting the unknown. One story that connects them to the present.

I /C. 10,900 BCE

GIZA PLATEAU

The First Builders

II /9600 BCE

GÖBEKLI TEPE

The Hunter

III /C. 5000 BCE

NABTA PLAYA

The Omen

Historical settings as portrayed in this work of speculative fiction.

03 — FROM THE BOOK

THE FIRST
WORDS.

An extract from the prologue of EXTINCTION INTERVAL.

PROLOGUETIME

We count time in hours and years. We name it in centuries. We trap it in calendars and clocks, convinced that if we measure it tightly enough, we can control it. But these are illusions - tools to make the incomprehensible feel manageable.

The human mind evolved to sense the change of seasons, to mark days by the sun’s arc and years by the rhythm of growth and harvest. We are creatures of immediacy, wired for what is now, what is near. Our stories, our memories, our entire histories flicker across generations like shadows on a cave wall.

Earth is 4.5 billion years old. Life has existed for over three billion. Our species, Homo sapiens, emerged approximately 300,000 years ago - a mere blink. Civilisation as we know it emerged barely 10,000 years ago.

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04 — AVAILABLE NOW

CHOOSE YOUR
EDITION.

Explore EXTINCTION INTERVAL in the format that suits you.

DIGITAL EDITION01

Kindle eBook

Take the mystery wherever you go.

Available from Amazon UK
£4.99 GBP
Buy Kindle edition
PHYSICAL EDITION02

Paperback

Hold the story in your hands.

Available from Amazon UK
£9.99 GBP
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05 — THE AUTHOR

J.A. HALSTEAD

Author of EXTINCTION INTERVAL, a speculative archaeological thriller exploring the mysteries of deep time, lost civilisations and the possibility that history holds warnings we have forgotten how to recognise.

Official website for the novel.

THE PAST HAS A MESSAGE

WILL WE RECOGNISE
THE WARNING?

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