Don Richard Riso Books

The first definitive guide to using the wisdom of the Enneagram for spiritual and psychological growthThe ancient symbol of the Enneagram has become one of today's most popular systems for self-und...

Discovering Your Personality Type: The Essential Introduction to the Enneagram, Revised and Expanded

By Don Richard Riso

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Personality types

By Don Richard Riso

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The incredible illustrated electricity book

By Don Richard Riso

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The Riso Hudson Enneagram Type Indicator RHETI Version 2.5

By Don Richard Riso, Russ Hudson

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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.