John McCaffery Books

The friar of San Giovanni

By John McCaffery

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The friar of San Giovanni

By John McCaffery

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Tales of Padre Pio

By John McCaffery

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Inspiring stories of Padre Pio's miracles, clairvoyance and bi-location.Capuchin monk and spiritual leader, Padre Pio (1887-1968), is known and venerated throughout the world. Drawn by his stigmata...

Algebra Book 1 Student Text

By John McCaffery, Ann Duffy, Helen Pearson

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Algebra Book 2 With Trigonometry Student Text

By John McCaffery, Ann Duffy, Helen Pearson

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What About Women A Matter of Opinion

By John McCaffery

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Blessed Padre Pio

By John McCaffery

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Tales of Padre Pio

By John McCaffery

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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.