Michael O. Tunnell Books

The children of Topaz

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The diary of a third-grade class of Japanese-American children being held with their families in an internment camp during World War II.

School spirits

By Michael O. Tunnell

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When Patrick moves to a new town, he is confronted by a ghostly boy who seeks his help.

Brothers in valor

By Michael O. Tunnell

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Three German teenagers who are members of the Mormon Church join forces to create a youth resistance movement during World War II, putting their lives at risk.

Moon Without Magic

By Michael O. Tunnell

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Wishing Moon

By Michael O. Tunnell

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The children of Topaz

By Michael O. Tunnell

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The diary of a third-grade class of Japanese-American children being held with their families in an internment camp during World War II.

Candy Bomber

By Michael O. Tunnell

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"World War II was over, and Berlin was in ruins. US Air Force Lieutenant Gail Halvorsen knew the children of the city were suffering. They were hungry and afraid. The young pilot wanted to help, bu...

Halloween Pie

By Michael O. Tunnell

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School Spirits

By Michael O. Tunnell

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The Prydain Companion

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.