Even if you think you already know a lot about football, mankind's greatest game, you will learn something from this book. This is football as it is played today with zone blocking, option routes, sophisticated blitzes all intelligently described. Do you really know the fundamental differences between a 4-3 and 3-4 defense? Kirwan explains. Published in 2010, the book is a little dated already (proving the ever-changing nature of football strategy.) There's a whole chapter on the Wild Cat, that quaint little trend from a few years ago. Surely a book published now about the read-option offense would look similarly dated in 2016. Easy to read, and very eye-opening, even if--especially if--you've watched football all of your life.