I don't have any book suggestions, sorry. But, I do know my friend potty trained both of her girls long before they were 2 years old, so, it's possible. If I were you, I'd be finding one of those readiness quizzes somewhere on-line. She may be ready, even though she's so young. If true, lucky you! If she doesn't show enough of the signs -- no sweat -- she'll be ready soon. Good for you for being so prepared!
-Beth