Cheryl Harness Books

Mary, Remember, and Bartholomew are among the pilgrims who survive the harsh early years in America and see New Plymouth grow into a prosperous colony.

They're off!

By Cheryl Harness

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Relates the history of the Pony Express from when it began to carry messages across the American West in April 1860 until the telegraph replaced it in October 1861.

Ghosts of the White House

By Cheryl Harness

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George Washington's ghost pulls a girl out of her school White House tour and takes her on a personal tour of the building, introducing her to the ghosts of previous presidents and to the history o...

Midnight in the cemetery

By Cheryl Harness

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An alphabet book, featuring collage art, in which ghosts scare away two children searching for treasure in a graveyard. Each illustration features objects representing a letter or letters of the al...

Mark Twain and the queens of the Mississippi

By Cheryl Harness

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Focuses on this American author's connection with steamboats on the Mississippi River while also presenting a history of the craft.

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.