Douglas Groothuis Books

On Pascal

By Douglas R. Groothuis, Douglas Groothuis

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ON PASCAL, like other titles in the Wadsworth Philosopher's Series, offers a concise, yet comprehensive, introduction to this philosopher's most important ideas. Presenting the most important i...

On Jesus

By Douglas R. Groothuis, Douglas Groothuis

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Christianity That Counts

By Douglas R. Groothuis, Douglas Groothuis

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The soul in cyberspace

By Douglas R. Groothuis

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Walking Through Twilight

By Douglas Groothuis

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The New Age Movement

By Douglas Groothuis

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In Defense of Natural Theology

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The New Age Jesus

By Douglas Groothuis

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Are All Religions One

By Douglas Groothuis

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Basic Christianity

By John R. W. Stott

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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.