Timothy J. Keller Books

Renowned pastor and bestselling author of The Prodigal Prophet Timothy Keller shares his most provocative and illuminating message yet. It is commonly thought in secular society that the Bible...

The Meaning of Marriage

By Timothy Keller With Kathy Keller

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“Incredibly rich with wisdom and insight that will leave the reader, whether single or married, feeling uplifted.” —The Washington TimesBased on the acclaimed sermon series by New...

Every Good Endeavor

By Timothy Keller With Katherine Leary Alsdorf

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New York Times bestselling author of The Prodigal Prophet Timothy Keller shows how God calls on each of us to express meaning and purpose through our work and careers.“A touchstone of the [ne...

Reason for God

By Timothy J. Keller

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Encounters with Jesus

By Timothy Keller

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New York Times bestselling author of The Prodigal Prophet Timothy Keller explores how people are changed by meeting Jesus personally—and how we can be changed encountering him today.The...

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.