David J. Eicher Books

"The Longest Night is strictly a military history. It covers hundreds of engagements on land and sea, and along rivers. The Western theater, often neglected in accounts of the Civil War, and the na...

The Longest Night

By David J. Eicher

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The Longest Night

By David Eicher

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Dixie Betrayed

By David J. Eicher

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Mystic chords of memory

By David J. Eicher

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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.