This is the official FAA Pilot's Handbook of Aeronautical Knowledge FAA-H-8083-25B. This handbook supersedes FAA-H-8083-25A, dated 2008. Released in 2016, includes all addenda as of 2021. Printed in Color. Full size: 8.5 x 11 inches. 523 pages. The Pilot's Handbook of Aeronautical Knowledge provides basic knowledge that is essential for pilots. This handbook introduces pilots to the broad spectrum of knowledge that will be needed as they progress in their pilot training. Except for the Code of Federal Regulations pertinent to civil aviation, most of the knowledge areas applicable to pilot certification are presented. This handbook is useful to beginning pilots, as well as those pursuing more advanced pilot certificates.