Create the book club material while you’re writing your book
As I’ve suggested, blog your book. Create the blog as soon as you get the idea for your book. Then, as you’re writing, think about questions and material which would help book club members to work with your book.
When you write your blog posts, add them to a special “book club” page on your blog. Not only will this help you in marketing once your book is published, it will also help you to write, because you’ll keep your readers in mind.
You're writing a book. You want readers.
Develop your readership while you're writing, by creating book club material for your book.