David A. Aguilar Books

Seven Wonders of the Solar System

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Travel the near and far reaches of the solar system in this lively, beautifully illustrated Smithsonian nonfiction book!Ready for a wondrous celestial journey? How about a trip to our close neighbo...

Planets Stars and Galaxies

By David Aguilar, David A. Aguilar

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Planets Stars and Galaxies

By David Aguilar

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11 planets

By David Aguilar, David A. Aguilar

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Author David Aguilar uses brilliant photo-realistic illustration and fascinating up-to-date facts straight from the latest astronomy news to bring you a comprehensive look at our solar system as yo...

11 Planets

By David Aguilar

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PLANETS

By David A. Agular

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Super Stars National Geographic for Kids

By David A. Aguilar

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Natinoal Geographic Kids Uzay Ansiklopedisi

By David A. Aguilar

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Enciclopedia del espacio

By David A. Aguilar, Pilar Alba Navarro

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Cosmic catastrophes

By David Aguilar

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From asteroid hit to alien invasion, astronomer David Aguilar builds the scientific case for seven extreme events that could impact Earth.

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.