John Coulthart Books

Cities and Thrones

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In the fantastical, gaslit underground city of Recoletta, oligarchs from foreign states and revolutionaries from the farming communes vie for power in the wake of the city's coup. The dark, forbidd...

Lord Horror

By John Coulthart, David Britton

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Graphic Classics

By Edgar Allan Poe, Rick Geary, Maxon Crumb, Stanley Shaw, John Coulthart, Richard Sala, Spain Rodriguez, Lisa K. Weber, Matt Howarth, Juan Gomez, J. B. Bonivert, Roger Langridge, Pedro Lopez

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Daring Desmond the Elevated Railroad Detective and Gideon Gault the Missing Head Mystery

By John Coulthart, Stuart Sergt. Milne, Lieutenant Lieutenant Carlton, Mark Williams

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Joe Phenix the Police Spy

By John Coulthart, Albert Aiken, Mark Williams

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Joe Phenix Private Detective

By John Coulthart, Albert W. Aiken, Mark Williams

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Wolves of New York

By John Coulthart, Albert W. Aiken, Mark Williams

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Kate Scott the Decoy Detective

By John Coulthart, Albert W. Aiken, Mark Williams

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H. P. Lovecraft

By John Coulthart, Duplicate Of OL22161A H. P. Lovecraft

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Frankenstein Deluxe Edition

By John Coulthart, Mary Shelley

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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.