Peter Grego Books

Solar System Observer s Guide Firefly

By Peter Grego

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Discovering the Universe Qeb Space Guides

By Peter Grego

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Discovering the Solar System Qeb Space Guides

By Peter Grego

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Exploring the Moon Qeb Space Guides

By Peter Grego

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Voyage Through Space Qeb Space Guides

By Peter Grego

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Moon

By Peter Grego

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"A guide to the geology of the moon, the causes of its mountains and crators, and finding the best equipment for you to observe the moon"--

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.