Alan J. Porter Books

Stand by for more adventures with the world’s greatest secret agent, as some of his most thrilling missions are collected for the first time ever!Death Wing sees 007 facing off against a uniq...

James Bond: Shark Bait

By Ian Fleming Jim Lawrence Yaroslav Horak Harry North

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The legend continues! Stand by for more adventures with the world’s greatest secret agent, as some of his most thrilling missions are collected for the first time ever!Shark Bait, a story nev...

An Unofficial Companion to the Novels of Terry Pratchett

By Alan J. Porter

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Star Trek

By Alan J. Porter

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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.