Al Hartley Books

The Invincible Iron Man Omnibus Volume 1 HC Iron Man
The Invincible Iron Man Omnibus Volume 1 HC Granov Variant Iron Man
Come meet my friend
Come meet my friend

By Al Hartley

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Yankee Doodle rides again
Yankee Doodle rides again

By Al Hartley

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"Yankee Doodle" examines some of the events that led to the founding of the United States, especially as they relate to freedom.

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Yankee Doodle on the frontier
Yankee Doodle on the frontier

By Al Hartley

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Depicts the dangers and excitement of the American frontier, where people overcame their differences to live together in God's harmony.

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Noah's Ark (Barbour Christian Comics)
Flying Colors
Flying Colors

By Al Hartley

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Fun in the car Barney Bear activity book
Happy Home
Happy Home

By Al Hartley

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Tell It on the Mountain
Tell It on the Mountain

By Al 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.

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