Joan Holub Books

Good Luck!
Good Luck!

By Joan Holub

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Why Do Cats Meow?
Why Do Cats Meow?

By Joan Holub

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Many children love cats, and there is so much to know about America's most popular pet. Why do they meow, hiss, and purr? Why do they have whiskers, tails, and claws? Beginning readers can find out...

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Who Was Charles Schulz?
Who Was Charles Schulz?

By Joan Holub

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Learn more about the cartoonist who created Charlie Brown, Snoopy, and the rest of the lovable Peanuts gang in this new addition to the #1 New York Times bestselling series!Charles (otherwise known...

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Who Was Jim Henson?
Who Was Jim Henson?

By Joan Holub

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Jim Henson broke into television with a five-minute puppetry segment when he was only a freshman in college. He created puppets like none ever seen before, with expressive fabric faces and rod-cont...

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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.

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