Henry Wiencek Books

When George Washington wrote his will, he made the startling decision to set his slaves free; earlier he had said that holding slaves was his "only unavoidable subject of regret." In this groundbre...

The Hairstons

By Henry Wiencek

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The God kings of Mexico Treasures of the World

By Thomas Dickey, Vance Muse, Henry Wiencek

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The Lords of Japan Treasures of the World

By Henry Wiencek

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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.