Catherine Matthias Books

A Rookie Reader Purple Is Part of a Rainbow Too Many Balloons I Love Cats

By Carolyn Kowalczyk, Catherine Matthias

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Puedo Ser Policia I Can Be a Police Offier (I Can Be Books)

By Catherine Matthias, Por Catherine Matthias

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Simple text and illustrations describe some of the duties of a police officer.

Out the door

By Catherine Matthias

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Demasiados globos

By Catherine Matthias

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A seven-year-old shares her colorful balloon collection, acquired one at a time, with zoo residents. Includes learning activities, parent tips, and word list.

Too many balloons

By Catherine Matthias

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A seven-year-old shares her colorful balloon collection, acquired one at a time, with zoo residents. Includes suggested learning activities.

Too many balloons

By Catherine Matthias

Average: 0.00, 0 Ratings

A seven-year-old shares her colorful balloon collection, acquired one at a time, with zoo residents. Includes suggested learning activities.

Demasiados globos

By Catherine Matthias

Average: 0.00, 0 Ratings

A seven-year-old shares her colorful balloon collection, acquired one at a time, with zoo residents. Includes learning activities, parent tips, and word list.

Too Many Balloons

By Catherine Matthias

Average: 0.00, 0 Ratings

I can be a police officer

By Catherine Matthias

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Simple text and illustrations describe some of the duties of a police officer.

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.