Clyde Robert Bulla Books

The Sword in the Tree

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After his father is reported dead and his wicked uncle takes over the castle, eleven-year-old Shan hides his father's precious sword and, after escaping with his mother, makes his way to King Arthu...

The Chalk Box Kid

By Clyde Robert Bulla

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A classroom favorite about the power of art and creativity.  A new neighborhood. A new school. A lonely birthday. Life isn’t easy for nine-year-old Gregory. Then he finds an abandoned ch...

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.