Johnny Marciano Books

Klawde: Evil Alien Warlord Cat 1

By Johnny Marciano, Emily Chenoweth Illustrated By Robb Mommaerts

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"Applaud for KLAWDE. Two paws up!"--Dav Pilkey, creator of the Dog Man series."Funny, savage, and brilliant, Klawde is the pet I wish I had."--Max Brallier, author of the New York Times Best Seller...

Klawde: Evil Alien Warlord Cat: Enemies 2

By Johnny Marciano, Emily Chenoweth Illustrated By Robb Mommaerts

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Klawde: Evil Alien Warlord Cat: Emperor of the Universe 5

By Emily Chenoweth, Johnny Marciano, Robb Mommaerts

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"Applaud for KLAWDE. Two paws up!"--Dav Pilkey, creator of the Dog Man series."Funny, savage, and brilliant, Klawde is the pet I wish I had."--Max Brallier, New York Times Bestselling author of The...

Klawde: Evil Alien Warlord Cat: Revenge of the Kitten Queen 6

By Emily Chenoweth, Johnny Marciano, Robb Mommaerts

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Klawde: Evil Alien Warlord Cat 1

By Emily Chenoweth, Johnny Marciano, Robb Mommaerts

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Klawde: Evil Alien Warlord Cat: Enemies 2

By Emily Chenoweth, Johnny Marciano, Robb Mommaerts

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Klawde

By Johnny Marciano

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Klawde: Evil Alien Warlord Cat: The Spacedog Cometh 3

By Johnny Marciano, Emily Chenoweth Illustrated By Robb Mommaerts

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Klawde: Evil Alien Warlord Cat: Target: Earth 4

By Johnny Marciano, Emily Chenoweth Illustrated By Robb Mommaerts

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Klawde

By Emily Chenoweth, Johnny Marciano

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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.