This is a work of fiction. Names, characters, places, and incidents either are the product of the author’s imagination or are used fictitiously. Any resemblance to actual persons, living or dead, events, or locales is entirely coincidental.

Text copyright © 2021 by Jennifer L. Holm

Cover art copyright © 2021 by Andy Smith

All rights reserved. Published in the United States by Random House Children’s Books, a division of Penguin Random House LLC, New York.

Random House and the colophon are registered trademarks of Penguin Random House LLC.

Photograph credits: this page, this page courtesy Jennifer L. Holm; this page courtesy NASA/JPL/Cornell University

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

ISBN 9780593121818 (hc)—ISBN 9780593121825 (lib. bdg.)—ISBN 9780593376942 (int’l ed.)—ebook ISBN 9780593121832

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