This book is about teaching your kids to take responsibility for their actions, and to respect other people. The message is that learning this can be painful for kids, but that you, as the parent, need to teach them these lessons. The book argues that it is better to calmly and clearly tell your child what you expect from them, and what will happen if they choose not to do this, rather than to nag them, or get angry with them, or let them get away with unacceptable behaviour. So, for example, a child who is rude to his/her parents might be 'grounded' and not allowed to be with his/her friends until he/she can demonstrate they can behave in a more sociable manner. Or a child who doesn't do his/her household chores won't get any pocket money. Or a child who interrupts will get ignored.
The concept is a simple one, but if, like me, you have a tendency to want to 'make everything OK' for your kids, it is a good reminder that parenting isn't a popularity contest, and that sometimes the best thing you can do for your children is to let them feel the consequences of their own actions, even if that hurts them.
Personally, I didn't like the style of the book - the authors are Christians, the book has many references to the bible, and is very 'clean-cut American' (for want of a better way of describing it). But I felt that the messages are valuable to anyone, of any religion or background. I haven't read the authors' other book (Boundaries) but the book also challenged my own behaviour, attitudes and motivation. I would say it is well worth a read, especially if (like me!) you are inclined to be a bit soft on your kids.