Format: a printed workbook of more than 200 pages, plus a digital editable version that works in PowerPoint, Google Slides and Pro Quick Draw.

Defense has gotten harder to teach. Offenses change faster than they used to, you get less practice time than you used to, and the communication has to be right or a kid takes the wrong fit and it is six points. Most defensive coordinators are not short on knowledge. They are short on a place to put it.

This is that place, on paper. You work through your defensive structure, your install order, your practice plan and your call sheet before the season starts, so that in October you are filling in a framework instead of rebuilding one every Sunday night.

The digital version matters more than it sounds. It is editable, so you change the language to match what you already call things rather than teaching your kids somebody else's terms.

Who it is for: defensive coordinators at youth, middle school and high school, and head coaches who call their own defense.

What it is not: it is not a scheme book. It will not teach you a front or a coverage. It organizes whatever you already run.

What to do next

• The in-season weekly companion: Defensive Coordinator Game Week Planner
• A scheme to put in it: 34 Fit and Swarm Defensive Overview Book
• For your line coach: Defensive Line Coach Workbook