John Heffernan Books

Stinky the tale of a smelly dog

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Stinky is a little dog who makes big smells. This new collection of fun, first chapter books for newly independent readers, has quirky stories and illustrations. In this book, join Stinky in his v...

Spud

By John Heffernan

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Two Summers

By John Heffernan

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Rick is coming to visit again during the summer holidays, but things are very different on the farm this year. Will Rick recognise the place? Will he have as much fun as last time? Same friend. Sam...

Two Summers

By John Heffernan

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A horse called Elvis

By John Heffernan

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The island

By John Heffernan

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Haunted Australia

By John Heffernan

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My dog

By John Heffernan

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The Mind Master Quentaris Chronicles

By John Heffernan

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Hotaka

By John Heffernan

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Hotaka and his coastal community of Omori-wan try to rebuild after a devastating tsunami, but Hotaka misses his best friend who was lost in the disaster and becomes entangled with his other friend...

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.