Laurie Calkhoven Books

Tactical to Practical

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Did you know that some of the newest innovations hidden inside your computer, embedded in your DVD player, or parked in your driveway started out as military technology? Join us as we investigate h...

Perfect world

By Laurie Calkhoven

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Guinness World Records

By Ryan Herndon, Laurie Calkhoven

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Guinness world records

By Ryan Herndon, Laurie Calkhoven

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40 records about amazing animals and amazing feats.

Just My Luck Movie Novelization

By Laurie Calkhoven

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Daniel at the Siege of Boston 1776

By Laurie Calkhoven

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Will at the Battle of Gettysburg 1863

By Laurie Calkhoven

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In 1863, twelve-year-old Will, who longs to be a drummer in the Union army, is stuck in his sleepy hometown of Gettysburg, Pennsylvania, but when the Union and Confederate armies meet right there i...

Once Upon A Time In Rhyme 28 Folk A Nd Fairy Tale Poems And So cass.

By Laurie Calkhoven

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Sterling Biographies George Washington

By Laurie Calkhoven

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Sterling Biographies Harriet Tubman

By Laurie Calkhoven

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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.