Probably one of the main achievements of the Soviet era is the enormous development of technical and basic sciences. It is worth saying that during the period 1950–1970, 7 people became Nobel Prize laureates in physics, 1 in chemistry (from 1980 to 2019, only 3, and that’s a stretch). The number of scientific workers in the USSR in 1975 was a quarter (a quarter, Karl) of the scientific workers of the whole world.  Being familiar with it from a course in electrodynamics, I can say that the reading is quite difficult, but entertaining, and non-specialists in the field of antennas and microwave devices will understand little in it. This book consists of solving diffraction problems on simple bodies and mainly consists of deriving formulas. Here are some, for example:
Example of output of one of the formulas  Stealth Aircraft concept Since the mid-20th century, almost all countries have used radar stations to monitor air or water space.
Let's focus only on air. The detection range of an object: an airplane, a helicopter, a seagull or a crow is largely determined by the characteristics of the radar, but there is one characteristic that is inherent to the object - the effective scattering area (ESR). EPR is a quantitative measure of the scattering of an electromagnetic wave. The higher the EPR value, the further away the object can be detected. The EPR is determined by the physical and geometric properties of the object. The problems solved by Ufimtsev allowed us to formulate the concept of inconspicuous objects. Using such an ideology in the construction of aircraft and knowing the characteristics of enemy radars, it was possible to significantly reduce the detection range. This technology, which will later become evident in Yugoslavia (this will be discussed in Part 2), can provide a huge advantage. Let me remind you that the time of writing the monograph was 1962, the time of the Cuban Missile Crisis and the Cold War. The world was on the brink of war and destruction. The arms race continued and the use of stealth technology could make it possible to take the lead in this race.
However, the Soviet Union did not take the idea seriously. And there are many reasons for this. At that time, the Soviet Union focused on the speed and maneuverability of aircraft (MiG-15, MiG-17). The new concept implied a complete abandonment of these parameters. To build an airplane using stealth technology, it was necessary to reinvent the airplane, just as Steve Jobs later reinvented the telephone. Unfortunately, the USSR is not a country in which any discussion on this matter was possible. The exact reason why the Soviet Union abandoned the development of a low-observability aircraft is unknown. The monograph sold a large circulation of 6,500 copies and it is doubtful that none of the management thought about using this theory.  “Ufimtsev’s contribution to the construction of this aircraft is about 30-40%, that is, a controlling stake.”