Bob McMahon Books

Cookie Broccoli

By Bob McMahon

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Cookie & Broccoli: Play It Cool: A Graphic Novel

By Bob McMahon

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Best friends Cookie and Broccoli take on popularity and overcoming obstacles together through kindness and laughter in this cheerful early graphic novel that's perfect for fans of Narwhal and Jelly...

The Sports Fan

By Bob McMahon

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Who are the best-- ?

By Bob McMahon

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Who are the best?

By Bob McMahon

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Let singing be my song

By Bob McMahon

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Think About It

By Nick Camus

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Hannah s Hanukkah Hiccups

By Bob McMahon, Shanna Silva

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Precepts for Living The Annual Sunday School Lesson Commentary 2005 2006

By Carl F. Ellis

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Soccer Time

By Bob McMahon, Terry Pierce

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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.