Leonard F. Guttridge Books

The great coalfield war

By George S. McGovern

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Ghosts of Cape Sabine

By Leonard F. Guttridge

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"Ghosts of Cape Sabine is an extraordinary, true Arctic drama of man against nature - and man against man." "Twenty-five men went north. Only six returned alive.". "In July 1881, an expedition com...

Ghosts of Cape Sabine

By Leonard F. Guttridge

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Icebound

By Leonard F. Guttridge

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Mutiny

By Leonard F. Guttridge

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The commodores

By Leonard F. Guttridge

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Dark Union: The Secret Web of Profiteers, Politicians, and Booth Conspirators That Led to Lincoln's Death

By Leonard F. Guttridge, Ray A. Neff

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Ghosts of Cape Sabine

By Leonard F. Guttridge

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Icebound

By Leonard F. Guttridge

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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.