Timothy J. Keller Books

Prayer

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Renowned pastor and New York Times bestselling author of The Prodigal Prophet Timothy Keller explores the power of prayer. Christians are taught in their churches and schools that prayer is the mo...

Making Sense of God

By Timothy J. Keller

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We live in an age of skepticism. Our society places such faith in empirical reason, historical progress, and heartfelt emotion that it’s easy to wonder: Why should anyone believe in Christianity? W...

The Prodigal God: Recovering the Heart of the Christian Faith

By Timothy J. Keller

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Worship by the Book

By Timothy J. Keller, Rev. Mark Ashton, R. Kent Hughes

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The Prodigal God 24-Pack: Recovering the Heart of the Christian Faith

By Timothy J. Keller

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Gospel in Life Study Guide: Grace Changes Everything

By Timothy J. Keller

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Gospel in Life is an intensive eight-session course on the gospel and how it is lived out in all of life. First in your heart, then in your community, and then out into the world.

Gospel in Life Video Study: Grace Changes Everything

By Timothy J. Keller

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Loving the City

By Timothy J. Keller

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Serving a Movement

By Timothy J. Keller

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Shaped by the Gospel

By Timothy J. Keller

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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.