This little tactical and more strategy, the book and DVD definitely help season/club whom want to coach volleyball. The contents material between the Jr. HP to JR. Olympic; or CAP I to CAP II; or High School coach that had college volleyball level. You won't find much in depth about how to train a "setter - hand, footwork..." however when running a drill it will mention when the setter should do an eyes check.
You also can see how design a drill (big task of a coach) that close to game like, that means after a drill, the player "automatically reflex" in real game (I don't like the player try to apply).
Serve-receive strategies: different formation "W", "U".
Lengthy of pro-cons of serving techniques to me not really science because no data back up or does not make any different for player play in back row pass ball all year long (I were in 80 player no libero position).
Some of the drills are awesome that afterward you will have a insight how to tailor your own drills more effectively.
I highly recommend it for HS coach and Jr. volleyball club coach. Believe me you won't regret it, "money back guarantee".