David W. Congdon Books

The mission of demythologizing

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"Rudolf Bultmann's controversial program of demythologizing has been the subject of constant debate since it was first announced in 1941. It is widely held that this program indicates Bultmann's de...

The God Who Saves

By David W. Congdon

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Karl Barth in conversation

By W. Travis McMaken, David W. Congdon

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The God Who Saves

By David W. Congdon

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Varieties of Christian Universalism

By David W. Congdon

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Who Is a True Christian

By David W. Congdon

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The mission of demythologizing

By David W. Congdon

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Varieties of Christian Universalism

By David W. Congdon

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Rudolf Bultmann

By David W. Congdon

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Karl Barth in Conversation

By W. Travis McMaken, David W. Congdon

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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.