Bob Tait’s CPL General Knowledge book brings together the core technical knowledge expected of a commercial pilot, explained in a clear, practical, exam-focused style. It covers aircraft systems and operations, engines and propellers, electrics and instruments, flight planning considerations, limitations, and performance-related principles—helping you connect theory to what you’ll see in the cockpit. Structured for efficient study and revision, it’s designed to build confidence for the CPL General Knowledge exam and real-world commercial flying.