Roger Elwood Books

Sudden fear

By Roger Elwood

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The teenage sons of an American diplomat find their lives in danger when they intercept a terrorist's message.

Terror cruise

By Roger Elwood

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Teenage brothers Ryan and Chad and their father, a secret agent for the CIA, are on board a cruise ship when terrorist bombs explode, causing them to call for God's help.

The Frankenstein project

By Roger Elwood

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A visit to a hospitalized friend plunges the Bartlett brothers into a mysterious scientific world that none of them may leave alive.

Forbidden river

By Roger Elwood

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Teenage brothers Ryan and Chad find themselves in the midst of an international conflict filled with terror and intrigue when their father is kidnapped by South American drug lords.

Disaster island

By Roger Elwood

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Their two-week trip to Hawaii nearly turns to disaster for Chad and Ryan Bartlett as they experience a volcanic eruption, a tidal wave, an earthquake, and a dreamlike encounter with an angel.

Nightmare at Skull Junction

By Roger Elwood

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Teenage brothers Chad and Ryan help their father uncover a deadly plot to force Indians living near a mining operation in the Mohave Desert off their land.

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.