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Line of Demarcation

Published
May 2025
Main Genre
Thriller Thriller
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Pages
432
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About This Book

The discovery of an oil field off the coast of Guyana plunges Jack Ryan, Jr into a cauldron of lies in the latest entry in this New York Times bestselling series.

It starts with the destruction of a US Coast Guard cutter and the loss of her entire crew. But the USCG Claiborne was on an innocuous mission to open a sea lane between an oil field off the coast of South America and the refineries of southern Louisiana. The destruction of the ship, tragic as it is, won't stop that mission from continuing.

So who would sacrifice twenty-two men and women just to slow down the plan? That's the question plaguing Jack Ryan Jr. He's in Guyana to work a deal to get his company, Hendley Associates, in on the ground floor of this new discovery, but Russia's Wagner Group and a pack of Venezuelan narco-terrorists have other ideas—and will risk war with the United States to see them through. It's up to Jack to identify the killers before they draw a bead on him, but how can he do that when the line of demarcation between friend and foe is constantly shifting?

Series Placement

Series Association
Book 13
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Paperback

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Trade Paperback
Feb 2026 Penguin ISBN 059371802X
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Hardcover

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Hardcover
First Edition May 2025 Penguin ISBN 0593718003
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eBook

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eBook
May 2025 Penguin ISBN 0593718011
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eBook
May 2025 -- Not Selected ISBN B0DDS59Z7R
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May 2025 Sphere (UK) ISBN 1408732769
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Audio

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Audible
May 2025 -- Not Selected ISBN B0DGBC84BD
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Audio CD
Jun 2025 Penguin Random House ISBN B0F47RJ6Z9
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Large Print

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May 2025 Diversified Publishing ISBN B0DDSZK3PD
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Hardcover
Jul 2025 Thorndike Press Large Print ISBN 1420519344
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