The MiG-31 started life as an advanced derivative of the famous MiG-25P interceptor, becoming the first Soviet fourth-generation combat aircraft. First flown in 1975, it differed from its progenitor primarily in having a crew of two (pilot and weapons systems operator), a highly capable passive phased-array radar a world first and new R-33 long-range missiles as its primary armament. The maximum speed was an impressive Mach 2.82, the cruising speed being Mach 2.35. The type entered service in 1981; more than 500 copies were built between 1981 and 1994. The powerful radar and other avionics allowed the MiG-31 to operate as a 'mini-AWACS' scanning the airspace and guiding other interceptors to their targets; a flight of three such aircraft in line abreast formation could cover a strip 800 km (500 miles) wide. To this day the MiG-31 remains one of the key air defence assets of the Russian Air Force. The book describes the MiG-31's developmental history, including upgrade programmes, and features a full and comprehensive survey of the various MiG-31 model-making kits currently available on the market. AUTHOR: Yefim Gordon was born in 1950 in Vilnius, Lithuania. He has been researching Soviet and Russian aviation history for more than 40 years and has one of the world's largest photograph and document archives on the subject. A professional aviation journalist and photographer since 1989, Yefim Gordon has published hundreds of features and photographs in Soviet, Russian and foreign aviation magazines. He has also authored and co-authored well over 100 books on Soviet and Russian aviation which are published in seven countries. He is a co-owner of the Moscow-based aviation publishing house Polygon Press Ltd.