I am not familiar with that book, but I would bet that you can find the same information on line if you don't mind a little surfing in the category of "body weight exercises".
fyi -- I just looked at his website and it lists lots of workouts for free. See: http://www.marklauren.com/20-minute-workouts-details.html#ladders If you don't understand what the exercise is, look for a video. None of this is rocket science.
IMO, in this day and age, most of what books give you is motivation. The idea that you paid for something makes you more likely to give it a good try.
But George is right -- if you are completely sedentary, just taking walks outside or riding a bicycle is a good start. But if you are trying to "get ripped" you would need a much more developed program. Most people are somewhere in between.
I personally like a lot of the advice at Mark's Daily Apple, particularly his "exercise pyramid". Part of that is that he is over 50 so I know he's probably not going to kill me with his recommendations. You can get a free fitness book here for the price of an email address: http://www.marksdailyapple.com/primal-blueprint-fitness/#axzz1oYZQaJdA