William Schelly Books

Harvey Kurtzman created Mad, and Mad revolutionized humor in America. Kurtzman was the original editor, artist, and sole writer of Mad, one of the greatest publishing successes of the 20th century....

John Stanley

By William Schelly

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This book is filled with the beautifully reproduced artwork of John Stanley from the comic books 'Little Lulu' and creations 'Melvin Monster' and 'Thirteen (Going on Eighteen)'; rare drawings and c...

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.