David Glover Books

What do ramps and wedges do

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Features artwork and photographs that help to explain the workings of machines. This title develops children's knowledge of the basic principles of their design and technology.

'What do Levers do?' explores the simple mechanism of levers and looks at the wide range of tools and toys that make use of them. Large, clear photographs show the principle in practice and careful...

What Do Pulleys and Gears Do

By David Glover

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What Do Screws Do

By David Glover

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What do springs do

By Glover David

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'What do Springs do?' explores the simple mechanism of springs and looks at the wide range of tools and toys that make use of them. Large clear photographs show the springs in practice and careful...

What do ramps and wedges do

By Glover David

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Exploring the simple mechanism of ramps and wedges. You will discover how ramps and wedges work and the wide range of tools and machines that make use of them. Large, clear photographs show the pri...

What Do Levers Do

By David Glover

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What Do Pulleys and Gears Do

By David Glover

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

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.