If a) you are not particularly ethical, and b) your ex isn't very bright, and c) you feel good about manipulating her to get what you want, then this simple-minded technique MAY work. Probably not, though.
Which is for the best-- If you're the sort of guy who would choose to follow the minimal advice in this brief, rather unpleasant book, then your ex is better off without you anyway.
Not recommended. One star is really too many for this overpriced book. [And yeah, I know it's free.]
(review of free book)