What is the main purpose of the books that each pilot receives when they check out a plane before each mission? To provide a physical record with details about the mission details in case the pilot needs to refer to anything.
To allow the pilot to record the exact details of the mission, so their commanding officer can review their performance.
It’s a resource that allows a pilot to troubleshoot in case of mechanical failure in-flight.
To maintain a record of the maintenance tasks performed on the vehicle so the pilot understands the “personality” of the vehicle.