Word Count by Non-Fiction Genre
Memoir: 70,000-100,000 words.
Business books: 70,000-80,000 words.
Self-help: 50,000-100,000 words.
Smart thinking: 80,000-100,000 words.
Travel writing: 70,000-100,000 words.
Nature writing. 80,000-100,000 words.
Textbooks: Vary enormously.