Bob Duff Books

Original Six Dynasties
Original Six Dynasties

By Bob Duff

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On the wing
On the wing

By Bob Duff

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Marcel Pronovost
Marcel Pronovost

By Marcel Pronovost, Bob Duff

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The China wall
The China wall

By Bob Duff

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If These Walls Could Talk Detroit Red Wings

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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.

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