Lou Schuler Books

The New Rules of Lifting For Life

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A customizable-and realistic-fitness program specifically created for midlifers who want to lose weight, revitalize energy, and build habits for increased longevity. Today's exercising adults are...

The Lean Muscle Diet

By Lou Schuler, Alan Aragon MS

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Research shows that although people can lose 5 to 10 percent of their body weight on any given diet, dieting itself is a consistent predictor of future weight gain. Why? At some point, everyone sto...

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.