Outline a nonfiction book

Help me outline a nonfiction book.
Inputs: book idea; reader; chapters.

1. Define the book's reader promise.
2. assign distinct chapter purposes and evidence.
3. check repetition, gaps and progression.

Deliver: Reader promise, Thesis, Structure, Chapter map, Chapter summaries, Overlap and pacing check, Research gaps.
Clarify critical gaps, separate facts from assumptions, and do not invent data, citations or completed actions.

My material: [fill in here]

Before you start

Provide book idea; reader; chapters.