Rob Ritchie Books

A2 Exam Secrets Chemistry A2 Exam Secrets

By John Sadler, Rob Ritchie

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Revise AS Chemistry Revise AS Study Guide

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Chemistry

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Divided into seven manageable 'day' sections, this timed revision programme covers essential GCSE topics in double page spreads. These spreads indicate how much time should be spent on each section...

Revise A2 chemistry

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Chemistry AS A2 Exam Practice

By John Sadler, Rob Ritchie

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Chemistry Revise A2

By Rob Ritchie

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A Level Chemistry for OCR A: Year 1 and AS

By Rob Ritchie

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A Level Chemistry for OCR A Student Book

By Dave Gent, Rob Ritchie

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OCR A Level Chemistry A Revision Guide

By Rob Ritchie, Emma Poole

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Strategic Penetration Griffith

By Rob Ritchie

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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.