There's a big difference between deciding that
you could use booklet printing for your marketing, and writing that
booklet by yourself.
If you are able to write a booklet by
yourself there's still the possibility that you might not have enough
time to, or other things would distract you from it. Writing a full
booklet can be a very time consuming venture, which is why you have to
have the right subject matter and the right kind of marketing in mind
to get it to work for you.