You can include your suggested TOC directly in the book description prompt.
The book description, including your TOC, can be up to 5000 characters long.
While the AI may not follow your TOC exactly, it will use it as a guide for structuring the book.
Example: "I want a book about gardening with the following chapters:
1. Introduction to Gardening, 2. Soil Preparation, 3. Choosing Plants, 4. Planting Techniques, 5. Watering and Fertilizing, 6. Pest Control, 7. Harvesting"
Keep in mind that the AI might adjust or expand upon your suggested structure based on its understanding of the topic and target word count.