Copyright

For online information and ordering of this and other Manning books, please visit www.manning.com. The publisher offers discounts on this book when ordered in quantity. For more information, please contact

©2018 by Manning Publications Co. All rights reserved.

No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by means electronic, mechanical, photocopying, or otherwise, without prior written permission of the publisher.

Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks. Where those designations appear in the book, and Manning Publications was aware of a trademark claim, the designations have been printed in initial caps or all caps.

The Go Gopher is © 2009 Renée French and used under Creative Commons Attributions 3.0 license.

Original illustrations by Olga Shalakhina are © 2015 Olga Shalakhina and used by permission.

Original illustrations by Erick Zelaya are © 2018 Erick Zelaya and used by permission.