Lisa Trumbauer Books

The haunted ghoul bus
The haunted ghoul bus

By Lisa Trumbauer

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After boarding the wrong school bus on Halloween, a young boy finds himself surrounded by ghosts, witches, mummies, and monsters.

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Click It Computer Fun Christmas
Computer Fun Halloween Click It
Computer Fun Writing
A Tooth Is Loose
A Tooth Is Loose

By Lisa Trumbauer

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Computer Fun
Computer Fun

By Lisa Trumbauer

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Computer Fun
Computer Fun

By Lisa Trumbauer

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Computer Fun
Computer Fun

By Lisa Trumbauer

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Cool Sites
Cool Sites

By Lisa Trumbauer

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Computer Fun
Computer Fun

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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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