James D. MacDonald Books

The Apocalypse door

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"Peter Crossman is a man with a mission and his boss is literally out of this world. His world is a dangerous place and it's Peter Crossman's job to protect it. Men of the cloth can only do so much...

Gene Roddenberry's Earth: Final Conflict--Requiem For Boone

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Gene Roddenberry's Earth Final Conflict Requiem For Boone Earth Final Conflict

By Debra Doyle, James D. Macdonald

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Timecrime, Inc.

By James D. MacDonald, Debra Doyle

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Knight's wyrd

By Debra Doyle

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Will Odosson sets out on a series of dangerous adventures after a wizard predicts that he will meet his death before a year has passed.

THE WIZARD APPRENTICE: SECRET OF THE TOWER.

By Debra And James D. Macdonald. Doyle

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Bad blood

By Debra Doyle

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Hunters moon

By Debra Doyle, D. Doyle

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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.