Aristides Ruiz Books

Curl up and chill out with this winter-themed omnibus including four ebooks based on the hit PBS Kids' TV show The Cat in the Hat Knows a Lot About That! With two based on the PBS Kids' holiday spe...

How Wet Can You Get? (Dr. Seuss Cat in the Hat)

By Tish Rabe, Joe Mathieu, Aristides Ruiz

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Sally and Nick are playing in the rain—and getting really muddy! So when the Cat in the Hat offers to show them how animals get clean, the kids are keen to find out. But can Sally and Nick really g...

Happy Pi Day to You! All About Measuring Circles

By Bonnie Worth, Joe Mathieu, Aristides Ruiz

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Laugh and learn with fun facts about the history of pi, measurements, theorems, and more—all told in Dr. Seuss’s beloved rhyming style and starring the Cat in the Hat! “It is all about circles and...

Happy Pi Day to You

By Bonnie Worth, Joe Mathieu, Aristides Ruiz

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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.