Rick Guzmán Books

Lorenzo s Revolutionary Quest

By Rick Guzman Lila Guzman

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George Lopez

By Rick Guzman, Lila Guzman

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Frida Kahlo

By Rick Guzman, Lila Guzman

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George Lopez

By Lila Guzman

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"Explores the life of Latino comedian and actor George Lopez, including his childhood and family, his path to success as a comedian, and his charitable work in the community"--Provided by publisher.

Lorenzo s Secret Mission

By Lila Guzman, Rick Guzman

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In 1776, fifteen-year-old Lorenzo Bannister leaves Texas and his father's new grave to carry a letter to the Virginia grandfather he has never known, and becomes involved with the struggle of the A...

Lorenzo's revolutionary quest

By Lila Guzman

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In 1777, under orders from George Washington, sixteen-year-old Captain Lorenzo Bannister drives 500 head of cattle east from San Antonio, Texas, to feed the Continental Army while enemies, old and...

Lorenzo and the turncoat

By Lila Guzman

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In the summer of 1779, having served as an officer in the Continental Army, eighteen-year-old Lorenzo Bannister enjoys a quieter life practicing medicine in Spanish-controlled New Orleans, until hi...

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.