Dennis Mammana Books

Other suns, other worlds?
Other suns, other worlds?

By Dennis Mammana

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The Night Sky
The Night Sky

By Dennis Mammana

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The night sky
The night sky

By Dennis Mammana

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Introduces the sky at night with informational articles, activities, sky maps, charts, and a description of an astronomer's work.

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Start Exploring the Night Sky
Start Exploring Space
Start Exploring Space

By Dennis Mammana

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Star hunters
Star hunters

By Dennis Mammana

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Star Hunters
Star Hunters

By Dennis Mammana

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The backyard astronomer
The backyard astronomer

By Dennis Mammana

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Basic Essentials Stargazing Basic Essentials Series
Start Exploring the Night Sky

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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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