This U.S. Air Force study reference, Air Force Handbook 1, The Airman Handbook, dated 1 Oct 2017, is for enlisted Airmen studying for promotion and is applicable for all grades. UPDATE: As of 1 Oct 2019, this book has been superseded by the newest version of the Air Force Handbook and its corresponding study guides, dated 1 Oct 2019. Use this version only if testing out of cycle. Produced by FreePDG.com.