Mark London Williams Books

Ancient fire

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A twelve-year-old boy from the twenty-first century, a girl from medieval Alexandria, Egypt, and a super-intelligent young saurian from an alternative Earth--each for different reasons--join togeth...

Ancient fire

By Mark London Williams

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Dino sword

By Mark London Williams

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Twelve-year-old time traveler Eli Sands continues his search for his missing mom, encountering new characters and trying to save the free world from tyrannical rule.

First Words

By Mark London Williams

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Magical Mayhem

By Linda Wisdom, Douglas Rees, Lynda K. Scott, Anna Marie McLemore, Carol Wolf, Catherine Haines, Alex Kahler, H. Scott Beazley, Mark London Williams, Rhonda Helms

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Ancient Fire

By Mark London Williams

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Two Trickster Tango

By Douglas C. Potter, Mark London Williams

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Two Trickster Tango

By Mark London Williams

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Dragon Sword

By Mark London Williams

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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.