Graham Frank Books

A farewell to heroes

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"As the younger Frank tells more of the story, we watch Lou Gehrig take Babe Ruth's place as the Yankee's star and then trace his glorious career to its tragic conclusion. We see firsthand the lege...

The castles of Northumberland

By Graham Frank

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Famous northern battles

By Graham Frank

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Elsdon, Otterburn and Redesdale

By Graham Frank

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Rothbury and Coquetdale

By Graham Frank

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Historic Holy Island

By Graham Frank

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The old halls, houses and inns of Northumberland

By Graham Frank

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Tynedale, from Blanchland to Carter Bar

By Graham Frank

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Chesters and Carrawburgh in the days of the Romans

By Graham Frank

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Birdoswald, Bewcastle and Castleheads in the days of the Romans

By Graham Frank

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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.