Peter Grego Books

My Little Book of Space

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"Do you know what our planet is made from? Can you imagine how life on Earth began, how earthquakes are caused and what Earth looks like from space? Take a guided tour around the Earth and discover...

Voyage through space

By Peter Grego

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Discusses space vehicles from rockets and space shuttles to softlanders, rovers and interplanetary probes and what they have helped us discover more about the solar system. Suggested level: primary...

Philip s Moon Observer s Guide

By Grego Peter

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Philip s Solar System Observer s Guide

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Philip s Moon Observer s Guide

By Peter Grego

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Discovering the Universe Space Guides

By Peter Grego

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Discovering the solar system

By Peter Grego

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Do you know how many planets can be found in our solar system? Take a guided tour into space and discover for yourself our cosmic backyard, the solar system - from its planets and stars, to its moo...

Explorer la Terre

By Peter Grego

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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.