David Hagberg Books

Burned

By David Hagberg

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The cabal

By David Hagberg

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"CIA operative Todd Van Buren meets with a Washington Post investigative reporter who has uncovered strong evidence that a powerful lobbyist has formed a shadowy group called the Friday Club. The c...

Blood Pact

By David Hagberg

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Abyss

By David Hagberg

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When an NOAA scientist has a breakthrough that could enable a sustainable energy source and prevent dangerous weather systems, former CIA director Kirk McGarvey begins a cat-and-mouse chase with a...

Retribution A Kirk McGarvey Novel

By David Hagberg

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End game

By David Hagberg

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"Langley is experiencing a series of gruesome murders. The CIA's own headquarters should be the safest spot on the planet, but a highly professional, violently psychopathic assassin, who hideously...

First Kill

By David Hagberg

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By Dawn s Early Light

By David Hagberg

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Soldier of God McGarvey

By David Hagberg

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Allah s Scorpion McGarvey

By David Hagberg

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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.