Mark Perry Books

Conceived In Liberty
Conceived In Liberty

By Mark Perry

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Lift Up Thy Voice
Lift Up Thy Voice

By Mark Perry

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In the late 1820s Sarah and Angelina Grimké traded their elite position as daughters of a prominent white slaveholding family in Charleston, South Carolina, for a life dedicated to abolitionism and...

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Four Stars
Four Stars

By Mark Perry

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The Most Dangerous Man in America The Making of Douglas MacArthur
The Pentagon s wars
The Pentagon s wars

By Mark Perry

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"The Pentagon's Wars is a dramatic account of the deep and divisive debates between America's civilian leaders and its military officers. Renowned military expert Mark Perry investigates these inte...

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The Most Dangerous Man in America The Making of Douglas MacArthur
Dead Ringers BBC MP3 CD Audio
Dead Ringers BBC MP3 CD Audio

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Dead Ringers
Dead Ringers

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Dead Ringers BBC Radio Collection
Dead Ringers BBC Radio Collection

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Dead Ringers TV Series 3 Radio Collection

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If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.

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