Martin H. Greenberg Books

The Diplomacy Guild Isaacs Universe Vol 1

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Phases in Chaos Isaac s Universe Vol. 2

By Jean Little

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Unnatural Diplomacy Isaac s Universe Vol 3

By Jean Little

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A Newbery Christmas

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A collection of stories about Christmas, by Newbery Award-winning authors such as Eleanor Estes, E.L. Konigsburg, Madeleine L'Engle, and Katherine Paterson.

A Newbery Halloween

By Jean Little

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A collection of short stories with a Halloween theme, by such Newbery Award-winning authors as E.L. Konigsburg, Beverly Cleary, Virginia Hamilton, and Paul Fleischman.

The Tom Clancy Companion

By Martin H. Greenberg

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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.