Harley Pasternak M.Sc. Books

The 5-Factor World Diet

By Harley Pasternak, Laura Moser, Harley Pasternak M.Sc.

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"The 5 factor world diet takes the 5-factor principles -- five meals a day, five core ingredients, five-minute prep time -- and incorporates the best foods and nutritional habits from ten of the wo...

5-Factor Fitness

By Harley Pasternak, Ethan Boldt, Theresa Foy DiGeronimo

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A comprehensive and practical guide for achieving your fitness goals, 5-Factor Fitness by Harley Pasternak, M.Sc. is a game-changer in the world of health and wellness. Harley's plan works for Holl...

5-Factor Fitness

By Harley Pasternak M. Sc.

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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.