Eugene TeSelle Books

Augustine the theologian.

By Eugene TeSelle

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Augustine

By Eugene TeSelle

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Christ in context

By Eugene TeSelle

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Living in Two Cities

By Eugene TeSelle

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"After setting the stage with a discussion of Augustine's own political journey, TeSelle examines the theme of "the two cities" against the background of the ancient world's civic vision, with the...

Living in Two Cities

By Eugene TeSelle

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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.