be careful
My sister gave me this book when I had my daughter. She read it some - I read it. I can see why it is very controversial. I don't think you should follow it word for word. BUt the general idea of schedules, etc is good. HOwever, I don't agree with putting wee little ones of only a few weeks old on such strict schedules. You need to be the mom and adjust to your child's needs in those early weeks for feeding/sleep/ etc. But the general schedule idea is pretty good.
ONe thing I did (actually BEFORE reading the book) was to wake my daughter at the same time each morning (after she started being more consistent with her sleep). So by 8 weeks I was waking her at 8:00 every morning, no matter what. I had a friend who thought I was crazy to wake her. BUt what it did for us was to set a routine for her naps and bedtime. Obviously if she was sick or had a bad night I wouldn't be so strict, but for the most part I followed it and within a few weeks she was waking on her own very happily around 8:00 and has ever since. It helped set her clock. But not everything works for everyone, and not every book has good advice. You have to pick and choose and follow your gut with how your raise your children!