Is there a defensive playbook from the pats online to look at? I’ve seen a 2004 offensive playbook online, but I could never find a defensive one.

Closest thing online is this ‘97 Belichick Jets Defensive Playbook. And here’s the 2004 Pats Offensive Playbook. Most interesting thing to study in that is all the different route combinations. Gives you a sense of why the WR position is a tough one.