Michael O Hearn Books

Hercules the harbor tug

By Michael O Hearn

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Noah and Tanika spend a day aboard the tugboat Hercules learning about the boats and animals in the harbor.

Hercules the harbor tug

By Michael O Hearn

Average: 0.00, 0 Ratings

Noah and Tanika spend a day aboard the tugboat Hercules learning about the boats and animals in the harbor.

Vampires vs werewolves

By Michael O Hearn

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What happens when two blood thirsty monsters clash? Vampires are crafty hunters that can change form at will and hypnotize their prey. But werewolves are powerful, ferocious beasts that are not eas...

Allosaurus vs brachiosaurus

By Michael O Hearn

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In this series, readers learn all about their favourite prehistoric beasts, and then grab a front row seat to see what it would be like to watch them battle for victory.

Triceratops vs stegosaurus

By Michael O Hearn

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In this series, readers learn all about their favourite prehistoric beasts, and then grab a front row seat to see what it would be like to watch them battle for victory.

Tyrannosaurus rex vs velociraptor

By Michael O Hearn

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Allosaurus vs brachiosaurus

By Michael O Hearn

Average: 0.00, 0 Ratings

In this series, readers learn all about their favourite prehistoric beasts, and then grab a front row seat to see what it would be like to watch them battle for victory.

Triceratops vs stegosaurus

By Michael O Hearn

Average: 0.00, 0 Ratings

In this series, readers learn all about their favourite prehistoric beasts, and then grab a front row seat to see what it would be like to watch them battle for victory.

Zombies vs. mummies

By Michael O Hearn

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"Describes the features and abilities of zombies and mummies and how they may battle each other in a fight"--Provided by publisher.

Vampires vs. werewolves

By Michael O Hearn

Average: 0.00, 0 Ratings

"Describes the features and abilities of vampires and werewolves, and how they may battle each other in a fight"--Provided by publisher.

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.