Penny Clarke Books

Big Cats Scary Creatures

By Mark Bergin, Penny Clarke

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Spiders Insects and Minibeasts Scary Creatures

By Penny Clarke

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Insects & spiders

By Penny Clarke

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Describes the physical characteristics, lifestyles, and environmental effects of such insects as ants, beetles, flies, and spiders.

Beneath the oceans

By Penny Clarke

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Discusses the formation, structure, currents, tides, food chain, and importance of our oceans.

Scary Creatures of the Arctic Scary Creatures

By Penny Clarke

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Scary Creatures of the Rain Forest Scary Creatures

By Penny Clarke

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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.