Roger I. Reyes Books

Skyworld woman

By Harriet Rohmer, Roger I. Reyes, Mary Anchondo

Average: 0.00, 0 Ratings

A bilingual presentation of the myth of the Skyworld woman who was responsible for the creation of man.

My Aunt Otilia's spirits

By Richard Garcia

Average: 0.00, 0 Ratings

When tall, skinny Aunt Otilia comes to visit from Puerto Rico, her curious nephew finds out about her magical powers.

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.