Rhea Perlman Books

Otto Undercover 6: Brain Freeze

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With the help of his aunts and his trusty racecar, undercover agent Otto Pillip battles his parents' arch nemesis, I.Skreem. Includes words spelled backwards, anagrams, and palindromes.

Otto Undercover 6: Brain Freeze

By Rhea Perlman

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Canyon Catastrophe Otto Undercover

By Rhea Perlman

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Water Balloon Doom Otto Undercover

By Rhea Perlman

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Otto Undercover: 10-Copy Mixed Floor Display

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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.