Helen Otway Books

Play Learn My First Write and Wipe

By Helen Otway

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Sunken treasure

By Helen Otway

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Max and Rachel experience a strange adventure when they discover an ancient wreck on the ocean floor.

The great big Christmas activity book

By Helen Otway

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"Packed full of games, puzzles and things to make and do, The great big Christmas activity book brings to life the joy of the Christmas holiday. Children will enjoy a nearly endless variety of acti...

1001 Unbelievable Facts

By Helen Otway

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1001 unbelievable facts

By Helen Otway

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Les extraordinaires aventures d Indiana Jones

By Helen Otway

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Aprendo con la Biblia

By Dynamo Limited, Maria Jesus Garcia Gonzalez, Helen Otway

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1001 gruesome facts

By Helen Otway

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Why Is Snot Sticky

By William Potter, Luke Seguin Magee, Helen Otway

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How Much Does a Cloud Weigh

By William Potter, Luke Seguin Magee, Helen Otway

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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.