Margaret Penston Books

Starpack

By Margaret Penston

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CANOPUS ENCYCLOPEDIA OF ASTRONOMY ED. BY PAUL MURDIN.

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The Firefly encyclopedia of astronomy

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Astronomy

By Ian Morison, Margaret Penston

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Pocket Guide to Stars and Planets

By Ian Morison, Margaret Penston

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"Con consejos acerca de como observar el cielo nocturno, este guia comprensivo destaca aquellos objetos del sistema solar que caben contemplar, como orientarse por las constelaciones de los hemisfe...

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.