John D. Witvliet Books

Worship in Medieval and Early Modern Europe

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Worship Seeking Understanding

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What exactly is worship? How can we account for its power? In Worship Seeking Understanding, worship expert John Witvliet mines the riches of the Bible, theology, history, music, and pastoral resea...

Proclaiming the Christmas Gospel

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The Worship Sourcebook

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Dwelling with Philippians

By Elizabeth Steele Halstead

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What s Love Got to Do with It

By John D. Witvliet, Sam Jr Hamstra

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Sybat...Plan a Worship Service

By John Witvliet

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Psalms for All Seasons

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Lift up your hearts

By Christian Reformed Church

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This hymnal supports the full range of actions in worship. It is designed to serve those involved with group singing, worship planning, praise teams and choirs, choral conductors, personal and fami...

A Child Shall Lead

By John D. Witvliet

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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.