Thomas Aquinas Books

De rationibus fidei

By Thomas Aquinas

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Selected Writings of Thomas Aquinas

By Thomas Aquinas

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In his reflections on Christianity, Saint Thomas Aquinas forged a unique synthesis of ancient philosophy and medieval theology. Preoccupied with the relationship between faith and reason, he was i...

Selected philosophical writings

By Thomas Aquinas

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Recht und Gerechtigkeit

By Thomas Aquinas

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Selected Philosophical Writings

By Thomas Aquinas

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The De Malo of Thomas Aquinas

By Thomas Aquinas

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On Evil

By Thomas Aquinas

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The Summa Theologica of St. Thomas Aquinas Vol. 3

By Thomas Aquinas

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The summa Theologica of St. Thomas Aquinas Vol. 2

By Thomas Aquinas

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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.