Christina Ashton Books

An introduction to the history of the English language, from ancient times to the present day, including the histories of a selection of words in everyday use.

Codes & ciphers

By Christina Ashton

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Provides the history behind codes and ciphers as used in spying and explains how readers themselves can make and use their own secret codes.

Understanding Scots law

By Christina Ashton

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Understanding Scots Law

By Christina Ashton

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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.