Andrew Jeffrey Books

Mastering Numbers

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The perfect antidote to numbers-phobia, this clear, concise guide explains everything you need to know about arithmetic, fractions, statistics, probability, algebra and geometry.We all use numbers...

Behind the Scenes on the North Yorkshire Moors Railway

By Andrew Jeffrey

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Numicon: Geometry, Measurement and Statistics 2 Easy Buy Pack

By Andrew Jeffrey, Simon D Angelo, Liz Gibbs, Tony Wing, Sue Lowndes

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50 Matchstick Puzzles

By Andrew Jeffrey

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Mastering Numbers

By Andrew Jeffrey

Average: 0.00, 0 Ratings

The perfect antidote to numbers-phobia, this clear, concise guide explains everything you need to know about arithmetic, fractions, statistics, probability, algebra and geometry.We all use numbers...

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.