Hugo A. Rivera Books

The Body Sculpting Bible for Men

By James Villepigue, Hugo A. Rivera

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The complete body sculpting bible for women

By James C. Villepigue

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Hardgainers' Bodybuilding Handbook

By Hugo Rivera

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Pack on muscle mass quickly and get bigger and stronger now-—an essential guide for the everyday weight trainer.Are you tired of working out with nothing to show for it? Are you pumping iron...

The weight training diary

By Hugo A. Rivera

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"The complete weightlifting workout diary-from bestselling author, body sculpting expert, and champion bodybuilder Hugo Rivera Hugo Rivera gives you the tools you need to keep your training workou...

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.