Roger Parry Books

People Businesses: Maximizing Profits in Professional Service Firms

By Roger Parry

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Making Cities Work

By Roger Parry, George Hazel

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"Making Cities Work showcases 28 initiatives from around the world that have enhanced the quality of urban life. The projects are presented in three sections, each tackling a different area of the...

Anticipating Disruption Boards Should Ask

By Roger Parry

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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.