David G. Hallman Books

AIDS Issues

By David G. Hallman

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Ecotheology

By David G. Hallman

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A Place in Creation

By David G. Hallman

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Caring for Creation the Environmental Crisis

By David G. Hallman

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Book tales

By David G. Hallman

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"Combining fiction, creative non-fiction, and semifictionalized autobiography, Hallman has crafted tales that draw readers into his characters' complex lives using the lens of books such as Paul Bo...

Ecotheology

By David G. Hallman

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A new and urgent item on the agenda of churches around the world is the theological and ethical dimensions of the ecological crisis. Highlighted by the United Nations "Earth Summit" in Brazil, the...

Spiritual Values for Earth Community

By David G. Hallman

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Spiritual Values for Earth Community Updated Edition Risk Book

By David G. Hallman

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August Farewell

By David G. Hallman

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Conservative Revolutionaries

By John S. Oakes, David G. Hallman

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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.