Elmer H. Duncan Books

Soren Kierkegaard

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"This series is not for the lazy. Each major theologian is examined carefully and critically- his life, his theological method, his most germinal ideas, his weaknesses as a thinker, his place in th...

To preach Christ

By Elmer H. Duncan

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Soren Kierkegaard

By Elmer H. Duncan

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Contemporary Essays on Greek Ideas

By William F. Cooper, Stuart E. Rosenbaum, Robert M. Baird, Elmer H. Duncan

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Soren Kierkegaard

By Elmer H. Duncan, Bob E. Patterson

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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.