Amy Costales Books

Lupe Vargas and Her Super Best Friend Lupe Vargas y su super mejor amiga

By Amy Costales

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Abuelita Full of Life Abuelita Llena de Vida

By Amy Costales

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Lupe Vargas and Her Super Best Friend Lupe Vargas y Su Super Mejor Amiga

By Amy Costales

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Abuelita Full of Life

By Martha Aviles, Amy Costales

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A young girl enjoys her family's weekly trip to Fourth Street, where she and her cousins eat mangos and tacos, look at clothes and shoes, watch all the people on the busy street, and take care of s...

Abuelo vivia solo

By A. Costales

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A young woman recalls her grandfather's abiding presence in her life as he cares for her throughout her infancy and childhood while her mother is at school or work, until she is the one fixing his...

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.