Mike Brennan Books

Scouting is Fun

By Dorothy Lees, Mike Brennan

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Alien

By Justin Kelly, Mike Brennan

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Electric girl.

By Mike Brennan, Michael Brennan

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The story of Virginia, a girl who can emit electric shocks at will, her dog Blammo, and her invisible gremlin friend Oogleeoog, who is always making trouble.

Cyber Styletto

By Mike Brennan, Gian Detorre

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Growth Now Movement Live Event Sketches

By Justin Schenck, Mike Brennan

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Alien

By Justin Kelly, Mike Brennan, Strategic Studies Institute

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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.