David D. Tanguay Books

Catch Catwoman! (DC Super Friends)

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When Catwoman steals their stuff, it's up to Batman and the DC Super Friends to catch this criminal kitten! Boys and girls ages 4–6 will love this leveled reader, now featuring action-packed comic...

Heroes vs. Villains Space Chase! (DC Super Friends)

By Erik Doescher, David D. Tanguay, Billy Wrecks, Mike DeCarlo

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It's two action-packed DC Super Friends paperback storybooks in one—plus over 50 stickers! On one side, boys ages 3-7 will be introduced to Batman, Superman, and all the Super Friends' amazing pow...

Catch Catwoman! (DC Super Friends) Read & Listen Edition

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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.