Michael Welker Books

What Happens in Holy Communion

By Michael Welker

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Calvin today

By Michael Weinrich, Ulrich Moller, Michael Welker

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Political theology

By Michael Welker

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"In this collection, six leading theologians on political theology explore the contemporary states and potential future of the discipline. Offering a highly nuanced and complex picture of 'older' a...

Theologische Profile

By Michael Welker

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Creation and Reality

By Michael Welker

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God the Spirit

By Michael Welker

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Reformed Theology Identity and Ecumenicity II

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The Work of the Spirit

By Michael Welker

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Loving God With Our Minds

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Toward the Future of Reformed Theology

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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.