Amazon-style memo writing is a decision-making format where you present a case in 6-page narrative prose instead of PowerPoint. The memo includes context, options considered, your recommendation, success metrics, risks, and mitigations. Readers can engage deeply, ask questions, and decide. No slides to hide behind. The clarity requirement forces better thinking. The format: 1-page executive summary, 2-3 pages on problem/options, 1 page on recommendation, 1 page on risks. Connected narrative, not slides. Embedded data and examples. References to appendices for details.