I've heard this book name so many times that I decided to read it out of curiosity despite the fact that I've been married for a decade. It is a quick and funny read. The idea is very simple: if a man loves a woman, he will overcome any obstacle to be with her. If he couldn't, then apparently, he is just not that into you!
I am not sure whether I should agree with the author Greg. He's got some good points, woman should not make excuses for men when they are simply not as enthusiastic about this relationships as women do. Don't waste your pretty on someone who doesn't appreciate it.
However, I think Greg's gone too far on this feminist path. He suggests that if the man doesn't call you after dates immediately, dump him; doesn't call back in time whether he is on trip or at work, dump him; if he doesn't propose and wants a marriage, no matter the reason, dump him! Under this extremely strict standard, I wonder anyone would ever have and maintain a long-term relationship at all, if it's not in a perfect world:)