Joe Colquhoun Books

Charley's War (Vol. 8): Hitler's Youth

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In this explosive new volume of never-before-collected comic strip, Charley comes face to face with a young corporal who will eventually change the face of the world as leader of the Nazi part...

Charley's War (Vol. 10) - The End

By Written By Pat Mills Illustrated By Joe Colquhoun

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In the final explosive volume of never-before-collected comic strip, including for the first time reproductions of strip pages from Joe Colquhoun's original artwork, we finally reach the epic concl...

Charley's War (Vol. 6): Underground and Over the Top

By Pat Mills Joe Colquhoun

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Acclaimed author Pat Mills (Marshal Law, Sláine) and legendary artist Joe Colquhoun (Johnny Red) continue the thrilling, horrifying tale of soldier Charley Bourne.Charley’s squad is deta...

Roy of the Rovers

By Tom Tully

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La Grande Guerre de Charlie

By Pat Mills, Joe Colquhoun

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Charley's War (Vol. 9): Death from Above

By Pat Mills, Joe Colquhoun

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A brand-new volume of never-before-collected comic strip! Things are looking up for Charley after he meets the love of his life, but the happy occasion of their wedding is destroyed by the roar of...

Charley s War Vol. 1 Boy Soldier

By Pat Mills, Joe Colquhoun

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Roy of the Rovers

By Frank Pepper, Joe Colquhoun, Andy Jacobs

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Roy of the Rovers

By Derek Birnage, Bobby Charlton, Fred T. Holmes, Joe Colquhoun, Andy Jacobs

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Roy of the Rovers

By Rob Power, Barrie Tomlinson, Joe Colquhoun

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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.