54. The Kazdin Method for Parenting the Defiant Child by Alan Kazdin
This is a really good book, I really like the method and believe that it works. It basically is about how to reinforce good behaviors by praising your child and not reinforcing bad behaviors to extinguish them. It seems pretty obvious, but this is the first book I've read that really emphasizes the effect your praise can have and doesn't deal a lot with how to punish but rather how not to punish (so that your punishment doesn't reinforce the behavior by giving lots of attention to it)