David Donohue Books

Walter Speazlebud

By David Donohue

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Groundwater Contamination

By Joseph Francis Keely, Steven M. Gorelick, David Donohue, R. Allan Freeze

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Moon man

By David Donohue

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Walter Speazlebud with his amazing abilities is going to use the incredible power of noitanigami and with his grandad's help, he will travel back to 1969 to discover the moon landing.

Alien timebomb

By David Donohue

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Sanctuary

By David Donohue

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Ha

By David Donohue

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Walter Speazlebud

By David Donohue, Aidan Harte

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Kif Dreams

By David Donohue

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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.