Thomas Locker Books

John Muir

By Thomas Locker

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The young artist

By Thomas Locker

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A talented young artist, commanded to paint the king's courtiers, all of whom wish to be portrayed with improved appearances, struggles with his sense of integrity which demands honest portraiture.

The land of Gray Wolf

By Thomas Locker

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Running Deer and his fellow tribesmen take special care of their land until they lose it to invading white settlers, who wear it out and leave it to recover on its own.

John Muir: America's Naturalist

By Thomas Locker

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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.