David H. Levy Books

Collins Skywatching

By David H. Levy

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Skywatching: The Ultimate Guide to the Universe

By David H. Levy

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The quest for comets

By David H. Levy

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The quest for comets

By David H. Levy

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The brilliant trailing beauty of fiery comets has inspired fear, wonder, and awe since the dawn of human history. Brighter than stars, moving and disappearing in their own singular orbits, comets h...

Impact Jupiter

By David H. Levy

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On July 16, 1994 a world-shattering event occurred that would rivet our attention for six explosive days and go on to make history as the single most important celestial event of the century. Comet...

Sharing the sky

By David H. Levy

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This is the perfect guide for the parent or teacher who wishes to introduce to young people the awesome delights of the universe. Contrary to popular wisdom, the daytime sky, as well as the nightt...

Sharing the sky

By David H. Levy

Average: 0.00, 0 Ratings

This is the perfect guide for the parent or teacher who wishes to introduce to young people the awesome delights of the universe. Contrary to popular wisdom, the daytime sky, as well as the nightt...

Quest for Comets

By David H. Levy

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Observing Variable Stars: A Guide for the Beginner

By David H. Levy

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The Sky

By David H. Levy

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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.