William Doyle Books

Charlie Kalenski in Pirates Treasure

By William Doyle

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Japanese Women Don't Get Old or Fat

By William Doyle, Naomi Moriyama

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What if there were a land where people lived longer than anywhere else on earth, the obesity rate was the lowest in the developed world, and women in their forties still looked like they were in th...

A Soldier's Dream

By William Doyle

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For six months in 2006, a charismatic young U.S. Army captain and Arab linguist named Travis Patriquin unleashed a diplomatic and cultural charm offensive upon the Sunni Arab sheiks of Anbar provin...

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.