“What’s the goal of this activity?” is a generous question to ask.
You might be writing a book to connect to potential or existing clients. It could be a chance to raise status and be seen as a “thought leader.” Seth Godin encourages you to write for change.
All are possible, and can mean different things to different folks.
Writing a book that offers its creator independence of thought, and maybe, in time, security, is a very different book from one that sells what you do.
It starts with writing down what you want to achieve.