Fred Hartley Books

Growing Pains

By Fred Hartley, Dean Hartley

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Offers teenagers advice on coping with parents, dating, drugs, and other aspects of life with a Christian viewpoint.

100

By Fred Hartley

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An invitation to the reader to make a "100%" commitment to Christianity. Uses anecdotes, sermons, and Bible excerpts.

Turn Your Wipeouts into Winners

By Fred Hartley

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Dare to date differently

By Fred Hartley

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Advice for daring to date within Christian boundaries. Includes discussion questions.

Atrevete a Ser Vencedor

By F. Hartley, Fred Hartley

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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.