Robyn Opie Books

Firefighters

By Russell Millard Robyn Opie

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Chick catches dinner

By Robyn Opie

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Chick can't sleep, so she goes walking. She meets Hoot the owl who teaches her to catch dinner. What will Chick catch?

Feeding

By Robyn Opie

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Photographs and simple text show children feeding their pets.

Leafy sea dragons

By Robyn Opie

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What are leafy sea dragons? How can we help them? Why must we help them?

What am I

By Robyn Opie

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There are riddles in this book. Can you solve the riddles?

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.

Robyn Opie Books

Firefighters

Good fires bad fires

Alice s Funny Photo

Teddy s Sticky Mess

Chick catches dinner

Ben s Colors

Feeding

Leafy sea dragons

Looking after a Dog

What am I

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

What is an EAN and How Does it Relate to an ISBN?