Airman Knowledge Testing Supplement for Sport Pilot, Recreational Pilot, Remote (Drone) Pilot, and Private Pilot FAA-CT-8080-2H: Flight Training Study & Test Prep Guide
This Airman Knowledge Testing Supplement is designed by the Federal Aviation Administration (FAA) Flight Standards Service. It is intended for use by Airman Knowledge Testing (AKT) Organization Designation Authorization (ODA) Holders and other entities approved and/or authorized to administer airman knowledge tests on behalf of the FAA in the following knowledge
It wasn’t strictly necessary for me to buy this book since the private pilot written test prep apps I used included the reference figures too, but I got a copy from a friend. I found that having the hard copy did make certain charts much easier to work with, compared to squinting at a screen.