This book offers a detailed guide to cloud security, from basics to advanced concepts and trends. It covers cloud service and deployment models, security principles like IAM and network security, and best practices for securing infrastructure, including virtual machines, containers, and serverless functions. It encompasses foundational cybersecurity principles, complex networking architectures, application security, and infrastructure design. Advanced topics like DevSecOps, AI security, and platform engineering are explored, along with critical areas such as compliance, auditing, and incident response.