Inverting the Pyramid: The History of Football Tactics - You need to read this book if you want to understand soccer tactics. It's a great book, but a bit dry in places. Also keep wikipedia handy you will be looking up a lot of names

How Soccer Explains The World: An Unlikely Theory of Globalization Might be a bit dated now (read it about 5 years ago) but its a fun book with introduction to many clubs the world over.