Brian, my thoughts on Jesse's book are as Dan's. However, I think there is so much info out there about training for anything right now, that more is generally not needed. So do you need it? Heck no!
Dan has a good thought that bears keeping in mind, which is that he is thrower, who lifts to support his throwing, and so he can tell what works by his throws. I think this has to be true for any sport. Whether John Jesse's book will help any more than what you get here, or from Jameson or from Twight- I don't have any idea.