Denis Markell Books

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By Denis Markell, Greg Watanabe

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The Great Stroller Adventure

By Denis Markell

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The Game Masters of Garden Place

By Denis Markell

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A quirky Dungeons & Dragons-inspired adventure that will appeal to gamers and readers of the Mr. Lemoncello's Library series.What if your favorite fantasy game characters showed up on your doorstep...

The Ghost in Apartment 2R

By Denis Markell

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What if there was a ghost in your brother's room? This kid-friendly mystery about three friends who try to help a restless spirit find peace is perfect for fans of Under the Egg and The Book Scaven...

The Ghost in Apartment 2R

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Ghost in Apartment 2R

By Denis Markell

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The Ghost in Apartment 2R

By Denis Markell

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The Final Cut

By Denis Markell

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An hilarious coming-of-age story about home, friendship, and learning that sometimes the most exciting adventures happen behind-the-scenes. Alex Davis is convinced that seventh grade is going to be...

Final Cut

By Denis Markell

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By Denis Markell

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Twelve-year-old Ted Gerson has spent most of his summer playing video games. So when his great-uncle dies and bequeaths him the all so-called treasure in his overstuffed junk shop of an apartment,...

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.