As for a book I suggest "Everything you need to know about potty training" you can find it at Barns and Nobel.
It has helped me a lot! We will be starting potty training next month and i have an idea what to do now.
There are several signs to look for to know if your child is ready to potty train.
* Having regular bowel movements
* He goes to a more private place when he feels the need to go
* Squating to make a BM
* He interacts and responds to questions
* Helping you dress them and can pull their pants up and down
* Following basic verbal instructions like,
"Come sit on the potty."
* Acknowledging when she is wet or poopy
* Becoming more independent and doing things for herself
* Aware that they are peeing and pooping
* Waking up dry from a nap
* Warning you before she needs to go potty
(this is a huge victory when toilet training!)
* Doing things to earn praise from you
* Imitating the behavior of others around her
As far as potty training age goes...i just attended a potty training class and learned you can start potty training from birth. Apparently you are never too young.
But...if they are not ready dont push them to do so. Pushing a child to start PT can cause a set back in training.
Most people i found on here say wait until they are 3 and dont rush. We started introducing our DD to Potty Seats and Chair at 18 months as well. Although is not ready for the pee pee part she seems to be ready for the poo poo part.
She is also a large child and in size 6 diapers during the day and pull ups at night because they dont sell size 7 diapers in the store...so we are out of luck and forced to pull ups for night time diaper.
If she gets any bigger we will have to move to pull ups alltogether...so we need to start PT soon.
Good luck in your PT.