Perry S. Marshall Books

"Covering the latest breaking news in Google AdWords, the fourth edition of this best-selling guide introduces revised, expanded, and new chapters covering Enhanced Campaigns, Google AdWords Expres...

Ultimate guide to local business marketing

By Perry S. Marshall

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The rollout of Amazon local services, continued growth of locally based apps like Uber for ride-sharing and OpenTable for restaurant reservations, and the proven power of reviews on sites like Yelp...

Ultimate guide to Google AdWords

By Perry S. Marshall

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"Covering the latest breaking news in Google AdWords, the fifth edition introduces revised, expanded and new chapters covering Enhanced Campaigns, Google AdWord's Express, Google's Product Listing...

Evolution 2.0

By Perry Marshall

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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.