Copyright © 2006
John Wiley & Sons Ltd, The Atrium, Southern Gate, Chichester,
West Sussex PO19 8SQ, England
Telephone (+44) 1243 779777
 
Under the Jossey-Bass imprint, Jossey-Bass 989, Market Street, San Francisco CA 94103-1741 USA
 
www.jossey-bass.com
 
Email (for orders and customer service enquiries): cs-books@wiley.co.uk Visit our Home Page on www.wiley.com
 
Reprinted with corrections April 2008
 
All Rights Reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, scanning or otherwise, except under the terms of the Copyright, Designs and Patents Act 1988 or under the terms of a licence issued by the Copyright Licensing Agency Ltd, 90 Tottenham Court Road, London W1T 4LP, UK, without the permission in writing of the Publisher. Requests to the Publisher should be addressed to the Permissions Department, John Wiley & Sons Ltd, The Atrium, Southern Gate, Chichester, West Sussex PO19 8SQ, England, or emailed to permreq@wiley.co.uk, or faxed to (+44) 1243 770620.
 
Designations used by companies to distinguish their products are often claimed as trademarks. All brand names and product names used in this book are trade names, service marks, trademarks or registered trademarks of their respective owners. The Publisher is not associated with any product or vendor mentioned in this book.
 
This publication is designed to provide accurate and authoritative information in regard to the subject matter covered. It is sold on the understanding that the Publisher is not engaged in rendering professional services. If professional advice or other expert assistance is required, the services of a competent professional should be sought.
 
Other Wiley Editorial Offices
 
John Wiley & Sons Inc., 111 River Street, Hoboken, NJ 07030, USA
 
Jossey-Bass, 989 Market Street, San Francisco, CA 94103-1741, USA
 
Wiley-VCH Verlag GmbH, Boschstr. 12, D-69469 Weinheim, Germany
 
John Wiley & Sons Australia Ltd, 42 McDougall Street, Milton, Queensland 4064, Australia
 
John Wiley & Sons (Asia) Pte Ltd, 2 Clementi Loop #02-01, Jin Xing Distripark, Singapore 129809
 
John Wiley & Sons Canada Ltd, 22 Worcester Road, Etobicoke, Ontario, Canada M9W 1L1
 
Wiley also publishes its books in a variety of electronic formats. Some content that appears in print may not be available in electronic books.
 
 
British Library Cataloguing in Publication Data
A catalogue record for this book is available from the British Library
ISBN 13 978-0-470-03079-0 (HB)
ISBN 10 0-470-03079-8 (HB)
 
Typeset in 11.5/15pt Bembo by SNP Best-set Typesetter Ltd., Hong Kong
Printed and bound in Great Britain by TJ International Ltd, Padstow, Cornwall, UK
 
This book is printed on acid-free paper responsibly manufactured from sustainable forestry in which at least two trees are planted for each one used for paper production.