Leon Gray Books

Solving the mysteries of Stonehenge
Amazing Animal Engineers
Amazing Animal Engineers

By Leon Gray

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Amazing animal communicators
Amazing animal communicators

By Leon Gray

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Sound, sight, and chemicals are all important as animals attempt to communicate warnings, information about food, to attract a mate, or sometimes just for pleasure. Whales communicate across hundre...

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Amazing animal communicators
Amazing animal communicators

By Leon Gray

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Sound, sight, and chemicals are all important as animals attempt to communicate warnings, information about food, to attract a mate, or sometimes just for pleasure. Whales communicate across hundre...

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Horrible Jobs of the Industrial Revolution History s Most Horrible Jobs
Plant Classification Life Science Stories
Horrible jobs of the industrial revolution
Horrible jobs of the industrial revolution

By Leon Gray

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"The Industrial Revolution brought about great changes, but this was a time before many labor laws, and many children had to work from sunup to sundown. The poor had to work as rat catchers and coa...

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HOW DOES A TOUCH SCREEN WORK?
HOW DOES A TOUCH SCREEN WORK?

By Leon Gray

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Discusses the history and evolution of touch screens and describes how they work, where they are used today, and possible future developments in the field.

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HOW DOES CLOUD COMPUTING WORK?
HOW DOES CLOUD COMPUTING WORK?

By Leon Gray

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Explains what cloud computing is, how it works, the services it provides, and its advantages and disadvantages.

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How does GPS work?
How does GPS work?

By Leon Gray

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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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