George H. Douglas Books

The Golden Age of the Newspaper

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"From the arrival of the penny papers in the 1830s to the coming of radio news around 1930, the American newspaper celebrated its Golden Age and years of greatest influence on society. Douglas tell...

The Smart Magazines: 50 Years of Literary Revelry and High Jinks at Vanity Fair, the New Yorker, Life, Esquire, and the Smart Set

By Douglas George H.

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Final score

By George Douglas

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Skyscrapers

By Douglas George H.

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The Early Days of Radio Broadcasting McFarland Classics

By George H. Douglas

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Skyscrapers

By George H. Douglas

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Skyscraper Odyssey

By George H. Douglas

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Rail city, Chicago, USA

By Douglas George H.

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The early days of radio broadcasting

By Douglas George H.

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Business Communication Casebook Three

By George H. Douglas

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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.