John Ryan Books

Harris Tweed
Harris Tweed

By John Ryan

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The Wisdom of Oracles
The Wisdom of Oracles

By John Ryan

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Ten Years With Custer
Ten Years With Custer

By Sandy Barnard

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Where the wind carries me--
Where the wind carries me--

By John W. Ryan

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Chicago
Chicago

By John Ryan Lorraine Johnson

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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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