Andrew T. Guzman Books

"This work illustrates how domestic competition law policies intersect with the realities of international business. The first part of the book provides country reports explaining the extraterritor...

Overheated: The Human Cost of Climate Change

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"In Overheated, Guzman takes climate change out of the realm of scientific abstraction to explore its real-world consequences. He writes not as a scientist, but as an authority on international law...

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.