Graeme Davis Books

Weapons and Gear of the Revolutionary War

By Dennis E. Showalter, Graeme Davis, Sarah Beckman

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"The story of Theseus and the Minotaur is one of the best-known Greek myths. It has inspired plays, films, books, and countless fantasy games. The Minotaur, originally a unique monster, has spawned...

Weapons and Gear of the Revolutionary War

By Dennis Showalter, Graeme Davis

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GURPS Vikings

By Graeme Davis

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Mummy

By Graeme Davis

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Celts Campaign Sourcebook

By Graeme Davis

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Earthquakes

By Graeme Davis

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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.