Allan J. Janssen Books

Gathered at Albany

By Allan J. Janssen

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Kingdom office and church

By Allan J. Janssen

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Allan J. Janssen draws on extensive pastoral and ecclesial experience as well as closely reasoned analysis to draw out the implications of van Rulers theology for the church today.

Constitutional Theology

By Allan J. Janssen

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A collegial bishop

By Allan J. Janssen

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Confessing the Faith Today

By Allan Janssen

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Confessing the Faith Today

By Allan Janssen

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Confessing the Faith Today

By Allan Janssen

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Karl Barth

By Allan J. Janssen, Matthew J. Van Maastricht, Karel Blei

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Karl Barth

By Allan J. Janssen, Matthew J. Van Maastricht, Karel Blei

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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.