I went through a period of time where I read a million and one parenting books. This one came highly recommended from a good friend (and cousin). I found that it lacked practicality and weighed heavily on scare tactics (ie: you're going to permanently damage and ruin your child if you do X, Y, & Z, but then never gave examples of what you should do in these situations). And I had a hard time with the fact that it claimed you can only love your child unconditionally if you fit their mold.
On the flip side, I've never liked rewards and punishment methods of parenting/teaching because I want my children to want to be good for being-good sake, and not because they want a sticker or don't want to have to flip their card to *gasp* red.
In short, too many holes, not enough answers.