This book is intended for people who have no prior knowledge of penetration testing, ethical hacking and would like to enter the field. It is a practical step by step guide to penetration testing that teaches the techniques and tools the real hackers use to hack networks and exploit vulnerabilities. The guide is based on Kali Linux and other tools. This guide assumes that readers have no knowledge of Kali Linux and teaches you through penetration testing exercises. This guide covers the all the phases of penetrations testing starting from reconnaissance to covering tracks. The main feature of the book is the 77 Pen-tests exercises that cover Wi-Fi penetration testing, client-side penetration testing, server-side penetration testing, creating, and delivering malware, social engineering, email spoofing, complete web penetration testing and Mobile phones penetration testing. The Penetration Testing Step by Step Guidebook is now in its third edition, thanks to the positive feedback from many readers who are interested in pursuing a career in information security and joining red or blue teams. The book materials have been updated to reflect the latest changes in the tools and Kali Linux. I hope you find this guide helpful and insightful as you learn more about penetration testing.