Laurie Calkhoven Books

Tactical to Practical

Average: 0.00, 0 Ratings

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

Average: 0.00, 0 Ratings

Guinness World Records

By Ryan Herndon, Laurie Calkhoven

Average: 0.00, 0 Ratings

Guinness World Records

By Laurie And Ryan Herndon Calkhoven

Average: 0.00, 0 Ratings

Awesome Ocean Records

Average: 0.00, 0 Ratings

Guinness world records

By Ryan Herndon, Laurie Calkhoven

Average: 0.00, 0 Ratings

40 records about amazing animals and amazing feats.

Just My Luck Movie Novelization

By Laurie Calkhoven

Average: 0.00, 0 Ratings

Sibling revelry

By Laurie McElroy

Average: 0.00, 0 Ratings

Drake and Josh are competing in a salsa making contest and also to see who can go the longest without their favorite thing--for Drake, junk food, and for Josh, video games. The loser of the contest...

Daniel at the Siege of Boston 1776

By Laurie Calkhoven

Average: 0.00, 0 Ratings

Will at the Battle of Gettysburg 1863

By Laurie Calkhoven

Average: 0.00, 0 Ratings

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...

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.