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First edition published 2020 (print and electronic)

© Pearson Education Limited 2020 (print and electronic)

The rights of Ed Byrne and Charles Clarke to be identified as authors of this work have been asserted by them in accordance with the Copyright, Designs and Patents Act 1988.

The print publication is protected by copyright. Prior to any prohibited reproduction, storage in a retrieval system, distribution or transmission in any form or by any means, electronic, mechanical, recording or otherwise, permission should be obtained from the publisher or, where applicable, a licence permitting restricted copying in the United Kingdom should be obtained from the Copyright Licensing Agency Ltd, Barnard’s Inn, 86 Fetter Lane, London EC4A 1EN.

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ISBN:  978-1-292-27651-9 (print)
            978-1-292-27652-6 (PDF)
            978-1-292-27653-3 (ePub)

British Library Cataloguing-in-Publication Data
A catalogue record for the print edition is available from the British Library

Library of Congress Cataloging-in-Publication Data
A catalog record for the print edition is available from the Library of Congress

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Cover design by Madras
Cover image © ikryannikovgmailcom/iStock/Getty Images

Print edition typeset in 11/14pt Electra LT Std by SPi Global
Printed by Ashford Colour Press Ltd, Gosport

NOTE THAT ANY PAGE CROSS REFERENCES REFER TO THE PRINT EDITION