Christopher Ogden Books

Legacy: A Biography of Moses and Walter Annenberg

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"The father fled East Prussia to escape the 1880s pogroms and, as a penniless immigrant boy, hawked newspapers on the streets of Chicago. The son, who lives on Philadelphia's Main Line and on a pal...

Legacy a Biography Annenberrg

By Christopher Ogden

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Life of the Party

By Christopher Ogden

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Life of the party

By Christopher Ogden

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Legacy

By Christopher Ogden

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Legacy

By Christopher Ogden

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Matter of Honor

By Christopher Ogden

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Legacy

By Christopher Ogden

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Legacy

By Christopher Ogden

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Pamela Harriman

By Christopher Ogden

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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.