The movie-going public got its first look at Russia’s newest multi-role combat aircraft with the release of Top Gun: Maverick, as the CGI generated adversaries of Mav and Rooster at climax of the movie. The Su-57 is claimed to have entered service with Russian in December of 2020, though reading between the lines of this book there seems to be a lot of teething problems yet to solve before it could be considered truly ready for prime time.
The author lays out very nicely the protracted development of the Su-57, starting with the MiG MFI program, through the PAK FA competition, concept development programs, and includes content on the MiG 1.44, the Su-47 Berkut, and short discussions of the upgraded Su-57M and the Su-70 unmanned aircraft.