Must read for football fans
As always a great read for any football fan. The in depth essays and analysis show interesting trends behind the scenes. The chapters on teams and the profiles on players are so much fun to read through. Some of the research they've only started on looks to have very promising new material for next year as well.

Great Book
This is the best, independently produced volume about pro football. The author and his team has have put much effort and research into this book and it is very detailed regarding the NFL teams and their stats.

A comprehensive guide of all 32 NFL teams, it is a must for any football fan.

Good stuff, as always
Not quite as staggeringly awesome as the baseball version of the Prospectus, but a great, great reference for the upcoming NFL season. It is interesting to see that there are metrics that can be applied to football just like the ones used in baseball, and the Football Outsiders do it better than anyone. If you're looking for predictions on the whole season, your team, or just some prep for your fantasy league, this book is for you.

Best of Breed
This is the 4th year Aaron Schatz and company have published a prospectus and they have become the best football analysts whose information is publicly available. they introduce statistical analysis in a very useful fashion that allows you to understand the strengths and weaknesses of your favorite teams and players. You can check out their work at footballoutsiders.com. They don't cover college football too much so this is mostly for NFL fans.

Top Notch as always
These guys write a better book each year and I've had all 4 since they first started doing them. I tell people, if you are a casual football fan, you might kinda like it, but won't be able to get through it. But if you are an obsessive football fan, it is a must-read.