Anyone read The Numbers Game - Why Everything You Know About Football Is Wrong?
Sounds pretty good and definitely offers an interesting view. For example a bit someone told me about it: goal from a corner in the PL requires an average of 50 corners, and when you count the risk of being hit by a counter attack, the value of corners is practically zero. So is it really worth the time to practice corners?
http://www.theguardian.com/books/2013/may/24/numbers-game-everything-football-wrong