James Trefil Books

In his previous books, A Scientist At The Seashore and Meditations At Sunset, James Trefil used commonplace settings in the natural world as a point of departure for probing the mysteries of na...

The Dark Side of the Universe

By Jame Trefil

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Award-winning writer James Trefil takes readers on a tantalizing journey to the outer reaches of the universe. Along the way he discusses scientific questions such as; How did the universe begin a...

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.