Douglas E. Richards Books

The Prometheus Project

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As the youngest members of a top-secret scientific team investigating a fantastic alien city buried deep underground, Ryan and Regan Resnick must outwit a group of ruthless invaders who have taken...

Time Frame

By Douglas E. Richards, Kevin Pariseau

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Stranded

By Douglas E. Richards

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The Prometheus Project Book 1 Prometheus Project

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The devil s sword

By Douglas E. Richards

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Kevin, Rachel, and Ben compete in a fencing tournament at Nellis Air Force Base, but soon discover they, and the tournament, are involved in a twisted plan to steal the ultimate weapon.

WIRED

By Douglas E. Richards

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Out of This World

By Douglas Richards

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Split Second

By Douglas Richards

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Quantum Lens

By Marc Vietor, Douglas E. Richards

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The Immortality Code

By Dan Bittner, Douglas E. Richards

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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.