David Poyer Books

A Country of Our Own: A Novel of the Civil War at Sea

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Reaching the agonizing decision to join the Confederate States Navy, abolitionist Lieutenant Ker Claiborne works to destroy a ship in order to undermine Union finances and experiences confrontation...

That anvil of our souls

By David Poyer

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Bahamas blue

By David Poyer

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The Threat

By David Poyer

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The Threat

By David Poyer

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The Threat

By David Poyer

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Tomahawk

By David Poyer

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Fire on the waters

By David Poyer

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A country of our own

By David Poyer

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The Dead of Winter Hemlock County

By David Poyer

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

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.