Erika McGann Books

The demon notebook

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Grace and her four best friends, Jenny, Rachel, Adie, and Una, are failed spell casters, but the first time they use a Ouija board they stumble upon real magical powers and watch helplessly as thei...

Demon Notebook

By Erika McGann

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Demon Notebook

By Erika McGann

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The demon notebook

By Erika McGann

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Demon Notebook

By Erika McGann

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Broken Spell

By Erika McGann

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The broken spell

By Erika McGann

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Bored with studying pure theory, Grace and her four best friends jump at the chance to learn practical witchcraft from the glamorous Ms. Gold, but they make a magical mistake that drags the past in...

Broken Spell

By Erika McGann

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Broken Spell

By Erika McGann

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Where Are You Puffling

By Erika McGann, Gerry Daly

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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.