SENTINEL: Book One — Eagle | Johnny Walker
Book One of the Sentinel Universe  ·  Available Now on Amazon

SENTINEL

Book One: Eagle

"Beneath the surface of everything you know,
a force has been waiting.
It is not a myth. It is not a government programme.
It is Sentinel."

Paperback on Amazon → Discover the World
SENTINEL Book One Eagle — Cover

ISBN 978-1-80574-013-1  ·  Johnny Walker

The Story Begins

London Is Flooding.
And Nobody Knows Why.

When an atmospheric anomaly tears through the Thames Barrier with forces no government can explain, two men — one an heir who never asked for his legacy, one a teenage thief who never knew his bloodline — discover that the organisation built to protect the world operates from beneath the Pacific Ocean. This is not a military story. This is not a superhero story. This is what happens when extraordinary technology meets the quiet weight of human duty — and everything goes wrong at once.

The Mission
"I solemnly accept the duty of Sentinel. I will protect life where others cannot. I will act without prejudice, politics, or personal gain."
The Stakes
Catastrophic escalation: six hours away. Leviathan construction: four hours. Flight time to London: two hours. The window is closing and Sentinel has never been tested at this scale.
The Technology
Jovonium — an element of extraterrestrial origin, buried in Earth's mantle for millions of years. It is not from here. And neither is the organisation that controls it.
The Universe

Inside the Sentinel World

SENTINEL is not just a story — it is an architecture. A universe built on alien science, human courage, and the question of what a person is truly made of when everything is at stake.

⚡
Jovonium
A rare, luminescent element of extraterrestrial origin — the power source behind all Sentinel systems. In contained form: shifting strands of blue, green, amber and crimson light. When destabilised: civilisation-scale consequences.
🏔
Homestead
The primary Sentinel base, carved from volcanic rock deep beneath Vandross Island in the Pacific. Houses aircraft hangars, medical bays, fabrication facilities, the Mole transit system — and the Jovonium Core at its heart.
✈
Eagle & Leviathan
Eagle: hypersonic, single-seat, crimson-nosed. Leviathan: the world's largest covert platform — rescue carrier, mobile hospital, fabrication facility and drone system in one. Its forward section, Caddy, separates for independent operations.
👁
The Opaline Gene
A genetic marker of extraterrestrial origin, identifiable by Opaline green eyes. Carriers interact with Jovonium in ways no technology can replicate. Both Scott Vandross and Jaxon Ried carry it. Its full implications remain incomplete.
🛡
The Sentinel Shield
The emblem of the organisation — geometric, precise, institutional. Integrated into aircraft hulls, suits and facility architecture. After the London crisis, it is already embedding into public consciousness worldwide.
🌍
The Program
Initiated millions of years ago — the deliberate introduction of the Opaline gene into the human lineage. Its full design, and who truly initiated it, forms the central thread of the franchise arc beyond Book One.
Inside the Book

Eighteen Chapters. One Reckoning.

"The planet did not break all at once. It began as a drift in stability — small enough to hide inside the noise of routine telemetry. The Jovonium core moved beyond tolerance. Regulators compensated. Compensators compensated back. Heat rose where heat was not supposed to rise."

From a press conference that redefines what leadership means, to a 17-year-old thief running through San Francisco rain holding something he was never meant to find. From the first descent into Homestead to the night Leviathan launched over a flooding London.

01
Press Conference
02
The Chase
03
The Transfer
04
Sentinel One
05
Depth Layer 1,000
06
London's Burning
07
Escalation
08
Leviathan
11
Synchronization
16
Sentinel Approach
17
I Swear
18
Epilogue: Revelation
The Team

Meet Sentinel

An organisation built for extraordinary things, staffed by people who carry more than most humans ever discover about themselves.

🛡
Sentinel One  ·  Age 24
Scott Vandross
Eagle  ·  Tracy Vandross Consortium Heir
He does not seek authority — he accepts responsibility. Precise, controlled, stepping into leadership at 24 not because he is ready, but because someone has to. The aircraft he flies was designed by his father. He is only beginning to understand why.
✈
Sentinel Two  ·  Age 17
Jaxon Ried
Leviathan / Caddy  ·  Opaline Gene Carrier
A 17-year-old from San Francisco with Opaline green eyes, a stolen data tablet, and absolutely no interest in doing what he's told. He processes the impossible with a reflex humour that is equal parts defence mechanism and genuine disposition.
🎩
Pilot  ·  Aide  ·  Sentinel Personnel
Albert
Operational Soul of Homestead
Impeccable in every setting. Chauffeur, then pilot, then something considerably more central than either role suggests. He carries the Sentinel Oath as if he wrote it himself. In many ways, he is the heartbeat of the entire organisation.
⚕️
Chief Medical Officer
Dr. William Herman Haas
Sentinel Medical  ·  Leviathan
Not unkind — but he has no patience for imprecision. He will save your life first and explain the correct terminology afterward. He oversees medical infrastructure capable of operating at disaster scale. He considers this a reasonable baseline.
🔭
Science Officer  ·  Systems
Glenn
Sentinel Operations  ·  Astrophysics
Young, precise, quietly extraordinary. He delivers catastrophic projections in the same calm voice he uses for everything else. He oversees the Jovonium Core and atmospheric calculations. Beneath the composure, he is genuinely funny.
🏛
Parliamentary Figure  ·  Antagonist
Jonathan Davidson
The Threat Watching from Westminster
At midnight, studying corrupted satellite imagery — feeling not surprise, but confirmation. Years assembling fragments from classified archives. In his coat pocket: a containment cylinder carrying a single crimson strand of Jovonium.
The Author

Written by Someone Who Lived the Extraordinary

Johnny Walker — Author of SENTINEL
Johnny Walker
Author  ·  Aviator  ·  Open Heart Surgery Coordinator
"I began writing this book with urgency. Parkinson's has a way of clarifying what matters. It removes the comfortable fiction that there will always be more time. And so I wrote faster — and I put more of myself in than I originally planned."

Johnny Walker's life has never moved in straight lines. From nursing in England to open heart surgery in the San Francisco Bay Area — rising to become Open Heart Surgery Coordinator, one of medicine's most demanding roles. Then, driven by a boyhood dream, he crossed to the flight deck of commercial aircraft.

When a diagnosis of Parkinson's disease required him to leave flying, he returned to medicine as a healthcare consultant. And then — finally — to the desk, and the story that had lived inside him for years.

SENTINEL: Book One is his debut novel, written at 72, with the authority of someone who has actually done the extraordinary things his characters do. Every flight sequence carries the fingerprints of a man who spent years behind real controls, at real altitude.

🛡

"Each one, teach one. That has always been the principle."

— Johnny Walker, from the Author's Note

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Published by Success Mindset Publishers Ltd. Both editions available on Amazon UK now.

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SENTINEL: Book One — Eagle
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Author
Johnny Walker
Publisher
Success Mindset Publishers Ltd
ISBN
978-1-80574-013-1
Series
Sentinel Universe — Book One
🛡

"And should the day come when others require aid beyond fear, beyond distance, or beyond hope — I will answer."

— The Sentinel Oath