Marc Harshman Books

When the End of Summer is Near

By Marc Harshman

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A family reunion provides many happy memories.

The storm

By Marc Harshman

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Only one

By Marc Harshman

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At a county fair there are five hundred seeds in one pumpkin, ten cents in one dime, eight horses on one merry-go-round, four wheels on one wagon, and so on.

Snow Company

By Marc Harshman

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Little Excitement

By Marc Harshman

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All the way to morning

By Marc Harshman

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Children around the world hear different night sounds before they go to sleep.

Roads

By Marc Harshman

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Provides a child's view of a car trip to visit grandparents.

One big family

By Marc Harshman

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When you have a big family, reunions can be loud and chaotic. But as this cheerful book demonstrates, they can also be tons of fun! From canoeing down the river to getting chased by bees to telling...

A Little Excitement

By Marc Harshman

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Snow Company

By Marc Harshman

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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.