Not bad. The author gets points for telling women a) that when women resist attacks by violent people they manage to escape more than half the time and b) to fight back against violence against them.
And boy, does she. Lori Hartman Gervasi encourages a take-no-prisoners approach to defending our lives, which, well, more power to her on that score. Especially since she goes out of her way to note that one reason many women don't fight back is because they have been conditioned to believe it's 'unlady-like' or anti-feminine to defend themselves. Gervasi also mentions that this same conditioning encourages women to be passive about the topic of self-protection from a preventative standpoint. It can take a vigilant and lengthy course to undo that kind of programming. I know that despite my paranoia about others, I rarely think about learning even basic self-defense strategy. Some may be put off by her hard knocks approach, though. Images of having to gouge someone's eyes out to save my life are currently haunting my dreams.
I also have to commend Gervasi for acknowledging reality here about just who commits the bulk of all violent crimes against women: men. 25% of all women will be the victims of sexual assault in their lifetimes and the vast majority of these assaults will be perpetrated by men. I can't tell you how many times I've had sexist dipshits try to tell me that not only am I 'paranoid' for worrying about my safety around male persons, but that pointing out that men still inflict an enormous amount of violence upon women is just 'misanthropic fear mongering.'
However, I think this book is best used as a companion to a formal defense class (or more than one class.) It's difficult to impossible to learn effective self-defense techniques from a dry, printed page (and the author herself admits as much.) Also, I'm just not sure about some of the things Gervasi tells women to do, here--like trying to fight back against an attacker by trying to punch his testicles. I've encountered two self-defense teachers who said specifically that this is not an effective resistance technique for various reasons (can't remember what they were exactly.)
I also like that she makes it crystal clear to readers that the bulk of the ways we protect ourselves must happen before it's 'too late,' and we are in the grip of an attacker. This book has good tips about how to recognize a misogynist, abusive and violent person (like lack of boundaries, obvious lack of respect for women, etc.) It also mentions that (duh) drug and alcohol use are not just unhealthy, they leave us extremely vulnerable. Intoxication, date rape drugs slipped in cocktails and being mentally and physically altered among strangers are actually dangerous behaviors. In college, I became so tired of explaining this to fellow classmates. High risk choices like this may be commonplace, but are also high risk. The best thing about Fight Like a Girl is as a call for women to empower themselves by relinquishing bad habits, either the habit of complacency about our survival, or the habit of laziness about our decisions.
ETA: There were some statistics in here I found shocking WRT sexual assaults--I'm going to try to verify them in real life. Gervasi claims on one page, with her most recent cite being the Violence Policy Center, that only 3% of all reported rapes happen at the end of a knife or a gun. On another page, her stat is 7% (no clear cite for that one.) This seems very low to me, and is another reason I'm less than enthusiastic about this book.