Philip R. N. Katcher Books

Pride of the South

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Introduction -- Confederate Leaders in the east -- Biographies: east: Edward porter Alexander -- Richard Heron Anderson -- Lewis Addison Armistead -- Jubal Anderson Early -- Nathan George Evans --...

The Army of Northern Virginia

By Philip R. N. Katcher

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American Civil War Commanders 2 Confederate Leaders in the East

By Philip Katcher, Philip R. N. Katcher

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American Civil War Commanders 1 Union Leaders in the East

By Philip Katcher

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Confederate Cavalryman 1861 65 Warrior

By Philip Katcher

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American Civil War Artillery 1861 65

By Philip Katcher

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The Civil War Handbook

By Philip Katcher, Philip R. N. Katcher

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The army of Robert E. Lee

By Philip R. N. Katcher

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Lethal glory

By Philip R. N. Katcher

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Civil war uniforms

By Philip Katcher, Philip R. N. Katcher

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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.