Michael O. Tunnell Books

Prydain Companion

By Michael O. Tunnell

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Mailing May

By Michael O. Tunnell, Ted Rand

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The Children of Topaz

By Michael O. Tunnell, George W. Chilcoat

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Children's Literature, Briefly

By Michael O. Tunnell

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The joke's on George

By Michael O. Tunnell

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Briefly surveys the life of the early American portrait painter and describes an incident in which George Washington, visiting his natural history museum, was fooled by a lifelike painting of two o...

The joke's on George

By Michael O. Tunnell

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Mailing May

By Michael O. Tunnell

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In 1914, because her family cannot afford a train ticket to her grandmother's town, May gets mailed and rides the mail car on the train to see her grandmother.

Mailing May

By Michael O. Tunnell

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In 1914, because her family cannot afford a train ticket to her grandmother's town, May gets mailed and rides the mail car on the train to see her grandmother.

The Prydain Companion: A Reference Guide to Lloyd Alexander's Prydain Chronicles

By Michael O. Tunnell

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A reference guide in dictionary format to the characters, places, objects, and themes in Lloyd Alexander's five-book series, the Chronicles of Prydain.

The joke's on George

By Michael O. Tunnell

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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.