Gray Hat Hacking The Ethical Hacker’s Handbook Third Edition. The goal of this book is to help produce more highly skilled security professionals who are dedicated to protecting against the malicious hacking activity. It has been proven over and over again that it is important to understand one’s enemies, including their tactics, skills, tools, and motivations. Corporations and nations have enemies that are very dedicated and talented. We must work together to understand the enemies’ processes and procedures to ensure that we can properly thwart their destructive and malicious behavior.