Agentic AI Engineering is the first field manual for building production-grade, enterprise-grade, and regulatory-grade AI agents. Spanning 24 chapters and 578 pages, it codifies the new discipline beyond software engineering—covering the Agentic Stack, cognition loops, governance, Agentic UX, AgentOps, design patterns, best practices, and code examples to turn fragile prototypes into resilient, trustworthy systems.