Marketing information - does this work?

Yesterday I came across a blog post entitled: The Fool-Proof Twitter Book Marketing Strategy You Need to be Using. My first reaction was, Yes, this is what I've been looking for, but having considered overnight some of the things the author is saying, I'm having second thoughts. 

One thing I do agree with is that merely announcing on Twitter that you've written and published a book will probably not add a single sale to your sales chart. I get tweets like this all the time from...