Cloud security doesn't fail because of a lack of tools. It fails because identity is misunderstood, permissions spiral out of control, and governance collapses under real-world pressure. The Practical Guide to Cloud Security is written for engineers and architects who live in production environments—not in slide decks. This book goes far beyond the shared responsibility model and dives deep into how cloud security actually works across AWS, Azure, and GCP. You'll learn how attackers move through cloud environments, why identity has become the new perimeter, and how small misconfigurations can escalate into major breaches. More importantly, you'll learn how to design systems that remain secure even when something goes wrong.