I bought it and got about halfway through and stopped reading. I thought it was going to be a soccer version of Moneyball but the questions asked/answered were mostly not particularly interesting and the authors seemed to have a poor grasp of efficient regression techniques and interpreting the data. But since you've got it, you might as well give it a go - the first three chapters are representative of the rest of the book so you can at least try to get at least that far.