"Coding for Penetration Testers: Building Better Tools" by Jason Andress and Ryan Linn is a comprehensive guide that delves into the practical application of various scripting languages in the field of penetration testing. The book provides a step-by-step approach to crafting customized penetration testing tools using popular languages like Perl, Ruby, and Python, empowering users to enhance their security assessments. The content encompasses a primer on scripting fundamentals, covering essential areas such as web scripting, scanner scripting, and exploitation scripting. Readers will navigate through illustrative examples of custom tool development, gaining insights into real-world scenarios where these tools can be effectively deployed. The book is divided into ten chapters, systematically exploring topics like command shell scripting, Python, Perl, and Ruby programming, web scripting using PHP, Windows manipulation with PowerShell, scanner scripting techniques, information gathering strategies, exploitation scripting, and post-exploitation scripting. This book is a valuable resource for penetration testers, information security professionals, and network and system administrators seeking to expand their toolset and enhance their security expertise.