I've come to the point in my football watching life where I'm no longer content with my superficial understanding of football. I never played and only know things mentioned on football broadcasts, where announcers generally refuse to educate the audience regarding the nuts and bolts and Xs and Os of football.
I love reading posts (from Brian and others) regarding Michigan's schemes, blocking assignments etc. but without a solid base of football knowledge I'm often lost.
Can anyone recommend a book giving a good primer on football schemes and formations?