Carol Ballard Books

Food allergy

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Many of us dislike certain foods and food can sometimes make us feel unwell, but only two percent of people have a real food allergy. This book will help you understand what a food allergy is and h...

El cuerpo humano

By Carol Ballard

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Help ik krijg geen lucht

By Carol Ballard

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Wat gebeurt er bij het in- en uitademen en hoe werken de longen? Allerlei vragen over de ademhaling en wat er fout kan gaan, worden beantwoord. Met praktische tips en kleurenfoto's, ook dwarsdoorsn...

Adli Bilimler Olay Yeri Inceleme

By Carol Ballard

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Adli Bilimler Suclulari ve Kurbanlari Tespit Etmek

By Carol Ballard

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Food for Feeling Healthy

By Carol Ballard

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Special diets and food allergies

By Carol Ballard

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This series looks at food and healthy eating topics for pre-teens. Each book explains nutrition and healthy food choices by relating them to looking and feeling good.

Ears

By Carol Ballard

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Eyes

By Carol Ballard

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Immune System

By Carol Ballard

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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.