Derek Haas Books

The silver bear

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Unencumbered by morals that would compromise his ruthless tactics, professional assassin Columbus becomes a formidable underworld ruler through a series of creative hits before targeting a presiden...

Bluthund

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Dark men

By Derek Haas

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There has always been a need in the spy game for covert missions so black no one in the American government, and almost no one in intelligence itself, knows of their existence. The left hand can't...

Right Hand

By Derek Haas

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Right Hand

By Derek Haas

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Assassin Trilogy

By Derek Haas

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Hunt for the Bear

By Derek Haas

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Hunt For The Bear

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Hunt for the Bear

By Derek Haas

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Columbus

By Derek Haas

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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.

Derek Haas Books

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

What is an EAN and How Does it Relate to an ISBN?