Marian C. McKenna Books

Tapping Reeve and the Litchfield Law School

By Marian C. McKenna

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Franklin Roosevelt and the Great Constitutional War

By Joseph McKenna, Marian C. McKenna

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"This new history of Franklin D. Roosevelt and the "Great Constitutional War" is a critical, revisionist portrayal of FDR's personal role in initiating, on the advice of his attorney general, Homer...

The Vikings return

By Marian C. McKenna

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The Vikings return

By Marian C. McKenna

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Myra Hess

By Marion McKenna, Marian C. McKenna

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The Canadian and American constitutions in comparative perspective

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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.