Michael Ruby Books

Washtenaw County Jail and Other Writings

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Long before the waterboarding controversy exploded in the media, one CIA agent had already gone public. In a groundbreaking 2007 interview with ABC News, John Kiriakou called waterboarding torture—...

The reluctant spy

By John Kiriakou

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Washtenaw County Jail and Other Writings

By Michael Ruby, David Herfort

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Memories dreams and inner voices

By Michael Ruby

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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.