Mark Howard Jones Books

Dreamglass Days

By Mark Howard Jones

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Black Wings of Cthulhu (Volume Three)

By S. T. Joshi

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More dark tales of eldritch horror set in the Cthulhu Mythos universe, first created by horror master H.P. LovecraftVolume three of the critically acclaimed Black Wings series offers seve...

Brightest Black

By Mark Howard Jones

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Flowers of War

By Mark Howard Jones

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Dream City Blues

By Mark Howard Jones

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Songs from Spider Street

By Mark Howard Jones

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Star Spawned

By Mark Howard Jones

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Cthulhu Cymraeg

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Before the American master of the macabre H. P. Lovecraft there was the Welsh wizard of the weird Arthur Machen, who filled his pages with tales of ancient evil. Now, completing the circle, comes...

Tales from the Rain

By Mark Howard Jones

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Beliefonomics: Realise the true value of your brand story

By Mark Howard Jones

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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.