Mark Marderosian Books

A powerful evil sorcerer has tricked almost everyone in the palace into drinking enchanted water, and it's causing them to grow younger every minute. With the Sultan as a boy on the throne and todd...

Iago's promise

By Katherine Applegate

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Iago has promised not to say an unkind word about anyone for two days. He'll be rewarded with a brand-new super-deluxe birdbath if he makes it. The trouble is he's overheard the newest members of t...

Who took the cake

By Zoey Zucker

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Anastasia

By Mark Marderosian

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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.