DAVID H. LEVY Books

The Scientific American Book of the Cosmos

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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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Observing Comets, Asteroids, Meteors, and the Zodiacal Light

By David H. Levy, Stephen J. Edberg

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This guide shows you how to make successful and valuable observations and records of comets, asteroids, meteors, and the zodiacal light. For each topic the historical background and current scienti...

Observing Variable Stars:Levy: A Guide for the Beginner

By David H. Levy

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The Ultimate Universe

By David H. Levy, Donald Goldsmith

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Impact Jupiter

By David H. Levy

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Scientific American s The Big Idea

By Scientific American

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Cosmology 101

By David B. Levy, David Levy

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Stars planets Discoveries

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.