Carl Sagan Books

Reader Study Guide for Cosmos
Reader Study Guide for Cosmos

By Carl Sagan

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Contact
Contact

By Carl Sagan

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The Varieties of Scientific Experience
The Varieties of Scientific Experience

By Carl Sagan

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“Ann Druyan has unearthed a treasure. It is a treasure of reason, compassion, and scientific awe. It should be the next book you read.” —Sam Harris, author of The End of Faith“A stunningly valuable...

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Communication with extraterrestrial intelligence
Communication with Extraterrestrial Intelligence
Cosmos
Cosmos

By Carl Sagan

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Intelligent Life
Intelligent Life

By Carl Sagan

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The cosmic connection
The cosmic connection

By Carl Sagan

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THE COSMIC CONNECTION
THE COSMIC CONNECTION

By Carl Sagan

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The Dragons of Eden: Speculations on the Evolution of Human Intelligence

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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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