John L. Allen Jr. Books

The Catholic Church: What Everyone Needs to Know

By John L. Allen

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A people of hope

By John L. Allen

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A People of Hope

By John L. Allen, Timothy M. Dolan

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One of the world's most respected religion journalists profiles New York's Archbishop Timothy Dolan, one of the country's—and possibly the world’s—most important Catholic leaders through lengthy ex...

The future church

By John L. Allen

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The Future Church

By John L. Allen

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One of the world’s foremost religion journalists offers an unexpected and provocative look at where the Catholic Church is headed—and what the changes will mean for all of us.What will the Catholic...

The Global War on Christians

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The Global War on Christians

By John L. Allen Jr.

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One of the most respected journalists in the United States and the bestselling author of The Future Church uses his unparalleled knowledge of world affairs and religious insight to investigate the...

Let s not forget God

By Angelo Scola

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To Light a Fire on the Earth

By Robert Barron With John L. Allen Jr.

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The highly anticipated follow-up to Bishop Robert Barron's hugely successful Catholicism: A Journey to the FaithAs secularism gains influence, and increasing numbers see religion as dull and back...

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.