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SIMON & SCHUSTER

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Copyright © 2018 by Dr. Rowan Hooper

All rights reserved, including the right to reproduce this book or portions thereof in any form whatsoever. For information, address Simon & Schuster Subsidiary Rights Department, 1230 Avenue of the Americas, New York, NY 10020.

First Simon & Schuster hardcover edition September 2018

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Jacket design by Christopher Lin

Jacket image by Liuzishan / Getty Images

Library of Congress Cataloging-in-Publication Data is available.

ISBN 978-1-5011-6871-0

ISBN 978-1-5011-6872-7 (ebook)