David R. Collins Books

Probo's amazing trunk

By David R. Collins

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Text and photographs depict the life of an African elephant from birth to death.

Ceb's amazing tail

By David R. Collins

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Ursi's amazing fur coat

By David R. Collins

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Ursi, an arctic polar bear, learns first to walk and then to hunt, discovers the dangers of her snowy world, and eventually leaves her mother to go off on her own.

J.R.R. Tolkien

By David R. Collins

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Describes the life of J.R.R. Tolkien, creator of Middle Earth and author of "The Hobbit" and "Lord of the Rings."

J. R. R. Tolkien Just the Facts Biographies

By David R. Collins

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Got a penny?

By David R. Collins

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Recounts the life of Dorothy Day, the twentieth century reformer who founded the Catholic Worker Movement and worked for the rights of the poor and the oppressed.

Beyond the clouds

By David R. Collins

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The life story of the dedicated teacher who was one of the seven astronauts killed in the Challenger space shuttle disaster.

Magnificent failure

By David R. Collins

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A brief biography of the Capuchin priest who struggled academically while young and in the seminary, but who then became widely known for his patient listening and counsel and for his prayers which...

Cesar Chavez

By David R. Collins

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Kim Soo and his tortoise

By David R. Collins

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A poor Japanese boy's pet tortoise helps him win a wish from the Emperor.

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.