Gerard Colby Books

Thy Will Be Done: The Conquest of the Amazon: Nelson Rockefeller and Evangelism in the Age of Oil

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At the heart of this story are two intensely ambitious and ultimately tragic figures: Nelson Rockefeller, scion of the liberal Standard Oil family, and William Cameron Townsend, founder of the ultr...

Thy Will Be Done: The Conquest of the Amazon: Nelson Rockefeller and Evangelism in the Age of Oil

By Charlotte Dennett, Gerard Colby, Charlott Dennett

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Du Pont: Behind the Nylon Curtain

By Gerard Colby, Gerard Colby Zilg, Robert Carse

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Du Pont Dynasty

By Gerald Colby, Gerard Colby

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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.