John A. Kessler Books

Reflections in Poetry

By John A. Kessler

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Terra incognita

By John A. Kessler

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Puts a human face on the stem cell debate by following the work of Dr. Kessler, a renowned expert in the field, as he searches for a cure to spinal cord injuries, and the breakthrough that will all...

Terra incognita

By John A. Kessler

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Reflections of an Ordinary Person

By John A. Kessler

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Ready Aim Retire

By John A. Kessler

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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.