Debbie Tilley Books

"Features more than 1,000 ASL sign drawings; all signs paired with ... color illustrations; introduction [explains] how to sign ASL and fingerspell; complete index of English terms for each sign, i...

Words Around the World American Girl Backpack Books

By Debbie Tilley

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Jock Spock

By Debbie Tilley, David Michael Slater

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Always Wear Clean Underwear: And Other Ways Parents Say I Love You

By Debbie Tilley, Marc Gellman

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Explains the little and big meanings of things parents tell their children, such as "Eat your vegetables," "Look both ways before you cross the street," and "Don't talk with your mouth full."

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.