Thomas Orton Books

Kenneth Callahan

By Thomas Orton, Patricia Grieve Watkinson, Kenneth Callahan

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"Kenneth Callahan's life spanned most of the twentieth century, and during that time he made many contributions to the art of the Pacific Northwest and the nation. Although Callahan traveled widely...

The lost glass plates of Wilfred Eng

By Thomas Orton

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"Seattle photo dealer and art historian Robert Armour believes his past bad luck is about to change when he stumbles upon long-lost glass negatives, the work of the great Chinese-American landscape...

Lost glass plates of wilfred eng.

By Thomas Orton

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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.