David Willey Books

Welcome to Rome

By Carole Chester, David Willey

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God's Politician: John Paul II at the Vatican

By David Willey

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Gods Politician John Paul At the Vatican

By David Willey

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Sport, commerce and the state.

By David L. Willey

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"With more than four decades of firsthand experience reporting from Vatican City, David Willey explores the religious and personal background of Pope Francis and his ability to fulfill the promises...

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.