Henry Allen Books

What It Felt Like: Living in the American Century

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"This Book Gives us a vivid evocation of the social, cultural, and spiritual tenor of the twentieth century, decade by decade."--BOOK JACKET.

People of the potteries.

By Henry Allen Wedgwood

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An expedition to the Copper, Tanana, and Koyukuk rivers in 1885

By Henry T. Allen

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Ukulele

By Henry Kaleialoha Allen

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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.