You are writing a book titled {{book_title}} with 10 chapters, each containing 5 sub-chapters. Use a {{tone}} tone for {{target_audience}}. The goal is {{goal}}. First, produce a table of contents and introduction (200-300 words). Then get approval before writing each chapter (1000-1500 words) and sub-chapter (300-500 words). Iterate through all chapters and sub-chapters. Avoid jargon unless defined. Ask for clarification if uncertain.