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This book is the authoritative end-to-end guide to prompting Claude Opus 5. Grounded entirely in Anthropic's official documentation and verified best practices, it takes you from foundational concepts through expert-level patterns covering system prompts, XML structuring, extended thinking, tool use, agentic workflows, long-context strategies, output control, domain-specific patterns, evaluation and prompt library design. Every recommendation reflects Opus 5's specific capabilities, behavioral characteristics and limitations, not generic LLM advice. Whether you are building production systems or pushing the boundaries of what Claude can do, this book gives you the systematic knowledge to extract maximum accuracy, reliability and efficiency from every prompt.

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Kick off your book project, get started with GhostAI, get better at marketing, or spend the day doing all three! Free live workshops on Zoom. Saturday, June 27, 2026.

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