The second volume of the monograph on the Messerschmitt Bf 109 F concentrates on the operational history of the fighter units operating this type in 1941-1942 period. The first part of the book constitutes a thorough insight into the combat use of Luftwaffe units equipped with Bf 109 Fs in air warfare in North Africa, the Mediterranean and Malta, where the aircraft had no equal rivals until the arrival of the Spitfire Mk V. The subsequent chapter features a comprehensive description of the battles against Soviet VVS from the start of Operation Barbarossa till the Summer Offensive in 1942, including the operations beyond the Polar Circle. The author uncoveres the fates of particular fighter units as well as individual pilots who fought in them.