Andrew Apostoli Books

Fatima for Today

By Andrew Apostoli

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Fatima for today

By Andrew Apostoli

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At the peak of World War I, Our Lady warned us of another possible worldwide conflict, the rise and spread of Communism, and a terrible persecution of the Church, unless people repented of their si...

Fatima para Hoy

By Andrew Apostoli

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Following Mary to Jesus

By Andrew Apostoli

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Walk Humbly with Your God

By Andrew Apostoli

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Walk Humbly with Your God

By Andrew Apostoli

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Answering the questions of Jesus

By Andrew Apostoli

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Archbishop Fulton Sheen s St. Therese

By Fulton J. Sheen, Andrew Apostoli

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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.