For those of you w/son's playing in college this is a great read about the Cape Cod League:
The Last Best League
For those of you looking for something for your Middle School/Jr. High son's I suggest a book called High Heat. Without giving too much away this book deals with how a pitcher copes with some personal/home drama and how he deals with a very bad HBP situation that ultimatly changes the pitcher and the batter's lives.
I would suggest the parent reading it first then decide if it is right or not for your son. (might want to read the synopsis on this one first).
High Heat