South Beach focuses on good carbs - and is not necessarily a "low carb" diet.
The diet is supposed to be good for people with insulin resistance and/or PCOS.
The basic methodology of the diet is to eliminate carb/sugar addiction. You do this by ridding the body of bad carbs and sugar. The first two weeks, you aren't allowed any sugar, HFCS, potatoes, alcohol, corn, carrots, beets, white flour, fruit, or rice. When you progress into phase two, you will start reintroducing good carbs slowly. My first week, I was eating foods like bison burgers, chicken cheesesteak saute, stuffed peppers, and parmesan crusted tilapia. Now does that sound like diet food? I've found a wealth of good recipes on this board, and some on the internet. Some i've created myself.
I like this diet because I'm not hungry, and I think that I can live with the changes I've made for the rest of my life.
Read the book, though. It will do a better job of explaining the methodology than I did.

I got mine on amazon, barely used, for two dollars. You might be able to check it out at the library for free.