Christopher Gravett Books

Be an eyewitness to the exciting world of the medieval castle, from the dramatic methods used to defend and attack castles to what life was really like for the people living inside its mighty battl...

Knight

By Christopher Gravett

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Knights castles

By Christopher Gravett

Average: 0.00, 0 Ratings

An introduction to life in the Middle Ages--the period between the Classical Age of ancient Greece and Rome and the Renaissance. Describes the types of castles thoroughout the world and various kin...

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.