Clean Code: A Handbook of Agile Software Craftsmanship by Robert C. Martin is a seminal book for software developers and engineers focused on writing clear, maintainable, and efficient code. Published in 2008 by Prentice Hall as part of the Robert C. Martin Series, this paperback edition offers practical advice and best practices for improving code quality and craftsmanship in agile environments.

This edition is the ninth printing from May 2011, featuring a foreword by James O. Coplien and contributions from The Object Mentors team. It includes detailed chapters on principles, patterns, and case studies that help programmers distinguish between good and bad code, write meaningful names, implement error handling, and practice test-driven development. Essential for software professionals aiming to write better code and improve their craft, this book remains a highly sought-after resource in the programming community.