Mechanics Book

[skymank]

I am trying to find a book that covers the mechanics of umpiring. I am a USSSA fastpitch umpire and I have worked with several partners and they all seem to do things a little different.
I have only been doing fastpitch for a couple of years and everytime I think I get it down,, a new partner wants to do something different.
I have the basics but would really like to see what the official book says.