Personally, I think these books are good for a little guidance, but try not to treat them as gospel or beat yourself up if they don't conform. I also followed a similar book (author was Tizzie Hall - Save our sleep). Admittedly, I didn't follow the routines until my baby was a little older (from around 4 months from memory) but when I did, she often threw me out on many occasions.
Your baby is still very young so I would tend at this stage to just try and listen to him, learn his crys, use the first few months to get to know each other and that way when you are ready to enforce routine (if he is not falling into his own by this stage) you will at least have an understanding of his needs and cries (ie, is he just wanting attention, does he have gas, is he hungry, etc) and be able to handle his needs a little better. Naturally you will both grow with experience.
Just my opinion anyway, best of luck with your new son.
I agree with all of this and just wanted to say that there is nothing wrong with a baby wanting attention. As someone else mentioned, they are too young to manipulate, they genuinely need love and affection.
For me the first 4 months or so are the best. I give as many cuddles as I can and as my babies want without fear of it making my life worse down the track. We don't do routines at this time and it's worked out fine for my 2 older boys, both slept well from the appropriate age. Third is still in this spoiling phase and we get nary a peep from him unless he's hungry. Each to his own.