Koch Richard Books

The 80 20 manager

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In his bestselling book The 80/20 Principle, Richard Koch showed readers how to put the 80/20 Principle--the idea that 80 percent of results come from just 20 percent of effort--into practice in th...

The Financial times guide to selecting shares that perform

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The 80 20 principle

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The 80 20 principle

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The power laws

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The 80 20 revolution

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The 80 20 individual

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The 80 20 manager

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The mentally retarded child and his family

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The mentally retarded child and his family

By Koch Richard

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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.