I purchased the aformentioned book after reading this comment out of interest (happily married so I don't care about dating anymore). After about 70 pages I have to say that I am not impresed at all. A bullet point list with these "undercover sex signals" would have done.

In my view nothing more than badly written psychobabble which probably does more harm than good.

An unexpected book that I read years ago, was "Dating Japanese Women Secrets". It had some eye opening concepts and advice in general, not just for Japan. Along those lines is a book titled "Fundamentals of Female Dynamics", and it also goes against the grain and conventional thinking. I believe both are still on Kobo or Amazon.

Overall, a lot of guys don't take a moment to look more deeply into the overall picture of what is going on, but instead think everything is innate and/or are instead getting sucked into a game where they will constantly lose. Life is way too short for that. The argument more guys need to be making, is about what's helping them to get the most out of life and get results.