Robert Egan Books

Drama within drama: Shakespeare's sense of his art in King Lear, The winter's tale, and The tempest.

By Robert Egan

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Breakfast of Champions

By Kurt Vonnegut

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Kurt Vonnegut's "explosive meditation" of a novel Breakfast of Champions (1973) is subtitled Goodbye Blue Monday!. It is peppered with simple, childlike illustrations drawn by the author, and it t...

La petite boutique des horreurs

By Egan Egan

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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.