Daniel E. Troy Books

Retroactive legislation

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Essential to the rule of law is that the rules not be changed in the middle of the game. This principle is embodied in the notion that legislation should apply prospectively. Yet, too often, Congre...

Retroactive legislation

By Daniel E. Troy

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Advertising and Free Speech

By Daniel E. Troy

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Speaking Freely

By John Corry, Doug Bandow, Edward H. Crane, Daniel E. Troy, Adam D. Thierer, Brandt E. Gustavson

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Advertising and Free Speech

By Daniel E. Troy

Average: 0.00, 0 Ratings

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.