D.W.
Congratulations!
Our son was just past 3 last summer when he was ready to potty train.
We honestly didn't rely on a book, more a common sense approach in finding out what made our son get motivated (his 3.5 year old cousin is nowhere near being ready mentally despite being able to do it physically).
Our pediatrician was the best source of information as he's counseled thousands of parents.
In our case, we set a goal as follows:
week 1 - try 3 times/day - get a sticker for trying each time
BIG celebration for going and lots of praise for trying
week 2 - try 5 times/day (same reward system)
week 3 - must go potty 3 times/day
If you go three times, get a prize of your choice - in his case it was cars
week 4 - must go potty 5 times/day (same reward system)
week 5 - must go whole week to get a big special prize.
By that point in time, he had it down. That's how our son responded to the training, but it was completely trial and error for us to determine what would motivate him - stickers and treats were not big motivators, but his favorite Cars characters certainly were.