The story is fiction, and "famous people". The guy gets into a strange world, lives on some landfill and, seemingly, catches rats. There is the “lower world” – the dungeons, and the “upper world” – a place for the elite. Even in this world, implantation is practiced into the brain of "matrices", into which you can load the skills available for study. By chance, the guy manages to obtain an engineering (basically expensive) matrix, which he successfully uses. This is all that is known.



Dmitry Sheleg, "The Unman" or Roman Zlotnikov, "The Earthman".