Angela Muss Books

Learn colors with Little red penguin

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Little red penguin travels to meet his animal friends and introduces colors along the way. There are questions and flaps to help reinforce color recognition and naming.

Frog and me

By Angela Muss

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A toddler plays with a frog at the park while the reader controls a frog finger puppet in the middle of the book. On board pages.

Aprende numeros con pequeno pinguino rojo

By Angela Muss

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Little red penguin travels to meet his animal friends and introduces the numbers 1 to 10 along the way. There are questions and flaps to help reinforce number recognition and sequencing. "El peque...

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.