Just a little tidbit, but one I thought was kinda cool. Recently picked up Arnsparger's Coaching Defensive Football. Got a used copy from Goodwill via Amazon. Opened it up to discover that it's signed with a personal message to a friend by Arnsparger himself. Now, I'm not quite an autograph fanboy like I was when I was a kid, but I still think it's a cool little unexpected tidbit for an ordinary purchase. It'll probably sit on my shelf for a few months, as I have quite a few offensive books to read first, but I'll eventually get to it.