Whether the book promotes manipulation is subject to interpretation. Some see it that way...but I don't. I think that most of the tactics promotes that guy understand psychology of the women, and to use that to their advantage. Essentially the promotes how to be attractive, different, and confidant. There are lots of gimmicks that the different pickup artists use in the book which includes magic and a bunch of other tactics. But the tactics are really secondary to the primary theme of the book which is that just about an man can attract women. The men in the book aren't naturals...they aren't your studs that girls are flocking around. They are guys who were essentially undesirables who all learned how to attract women. I believe that many men fall under the same category and that is why the book is a best seller.
If you want to get laid...the PUA books and teachings are incredibly useful for its tactics. On the other hand, if you have no desire to be a pick-up artist and want meaningful relationships, the books can serve as a starting point for someone who is lacking in self-confidence and are clueless on how to approach and feel comfortable around women.
I was previously a guy who felt comfortable around women as friend but had a difficult time escaping and/or avoiding the friend zone. I believe that the teachings helped me to better define relationships with women. When I met women I knew how to become their friend without necessarily being thrown into the friend zone. I understood the boundaries I had to set on the relationship in which I was entering. I'm sorry...it's not an easy thing to explain. Did I perform magic and ignore/neg women? No...but I presented myself in a fun, warm, and attractive manner while setting my expectations for relationship from the very beginning. I was not just living in a girls' world...we were sharing our worlds on an equal playing field.
If you are looking for a guide to get laid...there are much better ones out there. The reason why "The Game" is the PUA Bible is that it is incredibly readable, introduces you to the community in a very broad manner, and sticks to the basics of attraction.