forget parenting books. they're all a bunch of fluff that is very general and never seem to work for your child. all they do is pad the author's wallet.
potty training should be started as soon as the baby can hold his/her head on his/her shoulders. as soon as he wakes up in the morning, rush to the bathroom, take the diaper off and "sit" him on the pot (while still holding him so that he doesn't fall in). the cool air hitting his warm bottom generally will stimulate him to urinate. make sure to praise him for "using the potty". if he doesn't "use it" that time, that's okay. still flush the potty (to get him used to the noise) then replace the diaper if it is not wet/soiled. then every 30 minutes or so after that, take him back in there and repeat the process.
when he gets to be about 6 months old or crawling, increase the time between to about 45 minutes or so - all the while maintaining the praise when he does potty.
when he starts walking (around a year old) then you increase to about an hour or so. encourage him to "tell you" when he needs to go and don't punish for accidents. don't make him afraid to tell you he's dirty. you may tell him "you need to tell me sooner next time so that you don't feel all yucky".
when he gets to around 15 - 18 months, you should be able to be using only training pants and pullups at night. around this time, make a chart for him. for every day that he manages to "tell you" in time, he earns a little sticker. go buy i'd say about 10 "big boy" underwear. for every week he earns 7 stickers, he gets to throw away one pair of training pants and to pick out one pair of big boy underwear.
how do i know this works? my grandmother raised all 3 of her kids, all 4 of us grandkids and both of my kids this way. it's not as traumatizing if they are exposed to it early. don't read a stupid book and "wait till the child is ready" that's a bunch of hooey!