Marissa Valdez Books

Ambitious Girl

By Marissa Valdez, Meena Harris

Average: 0.00, 0 Ratings

Agata Holmes 1. Primer dia de cole

By Robbie Arnett, Elizabeth Olsen, Marissa Valdez, Roberto Vivero Rodriguez

Average: 0.00, 0 Ratings

Is for Ambitious

By Marissa Valdez, Meena Harris

Average: 0.00, 0 Ratings

Hattie Harmony: Worry Detective

By Robbie ARNETT, Marissa Valdez, Elizabeth OLSEN

Average: 0.00, 0 Ratings

An instant #1 New York Times bestseller!Award-winning actress Elizabeth Olsen and esteemed musician Robbie Arnett have created a fresh approach to wellness in a new series that shows children...

Hattie Harmony: Worry Detective

By Robbie Arnett, Elizabeth Olsen, Marissa Valdez

Average: 0.00, 0 Ratings

An instant #1 New York Times bestseller!Award-winning actress Elizabeth Olsen and esteemed musician Robbie Arnett have created a fresh approach to wellness in a new series that shows children...

Hattie Harmony: Opening Night

By Robbie Arnett, Elizabeth Olsen, Marissa Valdez

Average: 0.00, 0 Ratings

In this sequel to the #1 New York Times bestselling Hattie Harmony: Worry Detective by Elizabeth Olsen and Robbie Arnett, Hattie shares new tools for managing anxiety, just in time for opening nigh...

Who s in Charge

By Jenny Klion, Stephanie Allain Bray, Marissa Valdez

Average: 0.00, 0 Ratings

Who's in Charge?

By Stephanie Allain Jenny Klion Illustrated By Marissa Valdez

Average: 0.00, 0 Ratings

A People Magazine Back-to-School SelectionWith its infectious refrain, this powerful, age-appropriate picture book for young children underscores kids’ right to set boundaries—and take...

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.