Soccernomics: Why England Loses, Why Germany and Brazil Win, and Why the U.S., Japan, Australia, Turkey - and Even Iraq - Are Destined to Become the Kings of the World's Most Popular Sport. By Simon Kuper and Stefan Szymanski.
Lots of deep statistical analysis on loads of different issues in football, such as operating in the transfer market, why international teams do as well as they do at tournaments, penalty shootouts, etc. Extremely interesting for any fan of football.