That book is complete crap. It's archaic and a little sexist, but its biggest flaw is that it is written from a conventional conservative standpoint about traditional relationships and particularly marriage. I had to read it for a college class and write a paper and I hated every minute of it. If you really want to be a PUA and learn about female psychology as it relates to creating attraction, start with David Deangelo's "Double Your Dating." I promise you it will be the best $20 you ever spend in your life. After that, there are a lot of other books written by PUA's like Ross Jeffries, Mystery, Tyler Durden, etc.
If you read those traditional books, they are written by wussy Ph.D.'s who speak from the ivory tower with latent judeo-christian philosophy strung throughout, and yet they STILL manage to wind up divorced within years (like John Gray) because they've never really understood the attraction paradigm.
If you want to understand interpersonal relationship psychology from an objective standpoint, get on Amazon or Half.com and buy a used $10 social psychology textbook. If you read Double Your Dating first so you have a frame of reference to fit future information into, you will really have the light bulb come on as you read psych books.
I find textbooks to be WAY better at laying out objective information than Barnes and Noble's relationship section's books written by 62 year old academics who are balding and who have been married for 23 years. Just my two cents, but if you want to really get better at understanding women, read PUA books and go practice, practice, practice. That's how everyone gets good at this stuff.
Psychology of women 
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