Patricia Valdez Books

Joan Procter, Dragon Doctor

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For fans of Ada Twist: Scientist comes a fascinating picture book biography of a pioneering female scientist--who loved reptiles!Back in the days of long skirts and afternoon teas, young Joan Proct...

Joan Procter Dragon Doctor

By Patricia Valdez

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Ejder Doktoru Joan Procter

By Patricia Valdez

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Joan Procter, Dragon Doctor

By Felicita Sala, Patricia Valdez

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A fascinating picture book biography of a pioneering female scientist who loved reptiles!While other girls played with dolls, Joan preferred the company of reptiles. She carried her favorite lizard...

Joan Procter Dragon Doctor

By Felicita Sala, Patricia Valdez

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How to Hear the Universe

By Patricia Valdez Illustrated By Sara Palacios

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Discover new realms of outer space in this picture book biography of scientist Gabriela Gonzalez, who immigrated to America and became a ground-breaking scientist. Written by a molecular biolo...

How to Hear the Universe

By Patricia Valdez Illustrated By Sara Palacios

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Discover new realms of outer space in this picture book biography of scientist Gabriela Gonzalez, who immigrated to America and became a ground-breaking scientist. Written by a molecular biolo...

Joan Procter, Dragon Doctor

Average: 0.00, 0 Ratings

How to Hear the Universe

By Patricia Valdez

Average: 0.00, 0 Ratings

Discover new realms of outer space in this biography of scientist Gabriela Gonzalez, who immigrated to America and became a ground-breaking scientist. Written by a molecular biologist, this au...

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.