Roy Grinker Books

War Neuroses American Military Experience

By Roy R. Grinker, Roy Grinker

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Isabels World Autism And The Making Of A Modern Epidemic

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Korea and its futures

By Roy Richard Grinker

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In Korea and Its Futures, Roy Richard Grinker argues that the continued conflict between north and south Korea, and the prospects for peace on the Korean peninsula, must be understood within the br...

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.