I found these in a box in my house recently. These are 34-page football guides measuring 4" x 8", issued by the Prudential Insurance Company in 1966 and 1967, which I got in those years.
The 1966 issue pre-dates any football cards I collected, making it the first football-related item I acquired. I don't remember where I got them, maybe they were distributed to us at a Cub Scout meeting.
The inside contains a 1-page pre-season scouting report (including partial roster) for each team. The first few pages features then-Eagles' tight end Pete Retzlaff demonstrating all the exercises included in the "President's Council for Physical Fitness Program", so that we young lads could grow up big and strong.
I have only shown the covers and the Eagles' pages.