Graham John Books

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.

Graham John Books

The Penguindictionary of telecommunications

The Penguin dictionary of telecommunications

Graham John

I love you, mouse

A history of the siege of Londonderry and defence of Enniskillen, in 1688 and 1689 : with historical poetry and biographical notes, & c. by John Graham. The battles of Boynes, Athlone and Aughrim, the siege and capitulation of Limerick by Lord Macaulay with a brief introduction by W.M. Punshon

A history of the siege of Londonderry and defence of Enniskillen in 1688 and 1689 : with Historical peotry and biographical notes, &c. by John Graham. The battles of the Boyne, Athlone, and Aughrim, the siege and capitulation of Limerick by Lord Macauly

The Merrill studies in A farewell to arms.

The Merrill studies in Second skin.

The writer's voice

Craft so hard to learn

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What is an EAN and How Does it Relate to an ISBN?