Paul Haffner Books

Creation Scientific Creativity

By Paul Haffner

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The Cross and the Rainforest

By Robert Whelan, Joseph Kirwan, Paul Haffner

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Discourses of the popes from Pius XI to John Paul II to the Pontifical Academy of Sciences, 1936-1986.

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A Methodology for Term Papers and Theses

By Paul Haffner

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Creation and Scientific Creativity

By Paul Haffner

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THE SEVEN SACRAMENTS lie at the centre of Christian life and experience, for here God the Holy Trinity touches human lives and hearts. This book is one of the few at the present time to offer a glo...

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.