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by James Phelan

  Internal photography: p38, Tablet © Jbk_photography/Dreamstime.com; p38, Aircraft weather radar © istockphoto.com/olyniteowl; p91, Mud brick wall © istockphoto.com/rcphotos; p91, Cardboard placard © istockphoto.com/imagestock; p125, Stone Archway © istockphoto.com/hyslop; p161, GPS handheld device icon © Diana Rich/Dreamstime.com.

  All rights reserved under International and Pan-American Copyright Conventions. By payment of the required fees, you have been granted the non-exclusive, non-transferable right to access and read this e-book on-screen. No part of this publication may be reproduced, transmitted, down-loaded, decompiled, reverse engineered, or stored in or introduced into any information storage and retrieval system, in any form or by any means, whether electronic or mechanical, now known or hereinafter invented, without the express written permission of the publisher, Scholastic Canada Ltd., 604 King Street West, Toronto, Ontario M5V 1E1, Canada.

  First eBook edition: December 2014