Ingrid Roper Books

How to Run a Pet Business Set up a Lemonade Stand Be a Homework Helper and other ways to Make Money

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Yo Yos

By Ingrid Roper, Alan Tiegreen

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City Walks with Kids Washington D.C.

By Ingrid Roper Catron

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Moneymakers

By Ingrid Roper

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Presents ideas, tips, and true accounts to encourage girls to make, manage, and save money. Includes business starter tools such as business cards and price tags.

Yo Yo s

By Ingrid Roper

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You've heard of these yo-yo tricks, but can you perform them yourself? If not, here's your chance! With clear step-by-step instructions and detailed illustrations for more than thirty tricks, this...

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.