William E. Studwell Books

They Also Wrote

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"This book contains the biographies of songwriters, but not just any songwriters. Everyone profiled in this book is either not primarily known for writing music or is, in the author's estimation, u...

Opera Plot Index

By Luke Owen Pike, David Hamilton, William E. Studwell

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Christmas Carols

By William E. Studwell

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Ballet plot index

By William E. Studwell

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Cataloging books

By William E. Studwell

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Cataloging Books

By William E. Studwell

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The End of the Year

By William Studwell

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An Easy Guide to Christmas Carols

By William E. Studwell

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The popular song reader

By William E. Studwell

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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.