It will work. However, I bought the book myself and it's essentially common sense. The basic idea is to mix aerobic training with weight training on alternate days with Sunday (or whatever day suits you) off. You should eat healthily, six small meals a day except for your off day when you can eat what you like. You do this for twelve weeks and you should see great results.
That's the plot, and the plot WILL work, if you apply yourself to it. The problem with most people is that they lose motivation - i.e. the main reason why people can't look their best in the first place.
Anything in that book you can read on-line. The book is 80% motivational clap-trap with only a small proportion where it tells you what to do.
Follow this link for more information and read the reviews:
http://www.amazon.com/exec/obidos/tg/detail/-/
0060193395/qid=10299297... -1/ref=sr_8_1/002-8390989-7372062?s=books&n=507846
Steve