版权声明

Copyright © 2019 by Althea Press,Emeryville, California

First Published in English by Althea Press, an imprint of Callisto Media, Inc.

Simplified Chinese translation copyright © 2023 by Posts & Telecom Press Co., Ltd.

All Rights Reserved.

本书中文简体版由Althea出版社通过大苹果代理公司授权人民邮电出版社有限公司独家出版，未经出版者书面许可，对本书的任何部分不得以任何方式复制或抄袭。

版权所有，翻版必究。