Thomas Lennon Books

Night at the Museum: Battle of the Smithsonian: Made You Look!

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"Now you see it, now you don't! All of your favorite characters from Night at the Museum : Battle of the Smithsonian appear -- or disappear -- in this picture-puzzle book with real stills from the...

Reading Bayle

By Thomas M. Lennon

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Pierre Bayle (1647-1706) is a key intellectual figure of the period, and his Historical and Critical Dictionary is the philosophy best seller of all time. This work is a critical but sympathetic tr...

Ronan Boyle Into The Strangeplace (Ronan Boyle #3)

By Thomas Lennon, John Hendrix

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The third book in the hilarious New York Times bestselling middle-grade series set in the world of law-breaking leprechauns from actor and writer Thomas Lennon Ronan Boyle may be the youngest detec...

Ronan Boyle and the Bridge of Riddles

By Thomas Lennon

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Ronan Boyle and the Bridge of Riddles

By John Hendrix, Thomas Lennon

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Writing Movies for Fun and Profit

By Robert Ben Garant, Thomas Lennon

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Ronan Boyle and the Swamp of Certain Death

By Thomas Lennon

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Cuando Llegue El Amor When the Love Arrives

By Tom Lennon

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Ronan Boyle and the Swamp of Certain Death Ronan Boyle 2

By John Hendrix, Thomas Lennon

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Ronan Boyle into the Strangeplace Ronan Boyle 3

By John Hendrix, Thomas Lennon

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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.