John Mullarkey Books

Monet changes mediums

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Sixth-grade art student Logan and his cousin Becca find themselves transported back to 1856 Le Havre, France, where they must somehow introduce the young caricaturist Claude Monet to the local arti...

Shakespeare saves the Globe

By Lisa Mullarkey

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While helping to clean up their local community theater, twelve-year-old Mason and his friend Aubrey suddenly find themselves in 1598 London where a discouraged William Shakespeare has just lost hi...

Johnstown Flood an Up2U Historical Fiction Adventure

By Dana Martin, Lisa Mullarkey, John Mullarkey

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Johnstown Flood

By Lisa Mullarkey, John Mullarkey

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Get Ella to the Apollo

By Lisa Mullarkey, John Mullarkey, Courtney Bernard

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Mary Molds a Monster

By Lisa Mullarkey, John Mullarkey, Courtney Bernard

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Monet Changes Mediums

By Lisa Mullarkey, John Mullarkey, Courtney Bernard

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Shakespeare Saves the Globe

By Lisa Mullarkey, John Mullarkey, Courtney Bernard

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Get Ella to the Apollo

By Lisa Mullarkey, John Mullarkey, Courtney Bernard

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Mary Molds a Monster

By Lisa Mullarkey, John Mullarkey, Courtney Bernard

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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.