Do you known any book that really focus on drills? Most of the books I've seen all talk about fundamentals such as stance, bridge, aiming etc. I want to find something that has a good collection of drills.
I don't think so that there is actually any books available on drills. I have searched everywhere online but I can't find any books specific on drills, you might get books like baseball drill book from amazon dot com. I guess there isn't any.