Jeffrey Lefko Books

Solomon Squirrel s amazing Chanukah adventure

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This is the story of Solomon Squirrel and his family who celebrate the Chanukah holiday every year but this year is going to turn out to be the most special of them all. What happens to Solomon and...

Solomon Squirrel s Amazing Washington D. C. Adventure

By Stephanie Burgess, Jeffrey Lefko

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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.