This is set in 1950s Peru and concerns Mario (Varguitas), an 18 year old law student who writes news bulletins for a radio station, but wants to become a proper writer.
The drivers of the plot are the two Bolivians of the title, both of whom Mario obsesses about in different ways: a workaholic writer of radio soaps, brought in to boost ratings, and Mario's divorced 32-year old aunt Julia. The chapters of the book alternate between the real story of Mario and episodes of Pedro Camacho's soaps, though oddly, the latter are presented as ordinary narrative, not as scripts.
The soaps are deliberately formulaic, with scandalous improbability (incest, murder, genital mutilation, rape, religious cults etc) and always ending on at least one cliffhanger. They also reflect Camacho's personal preferences and prejudices: the hero is invariably "in the prime of his life, his fifties" and there are always slurs against Argentinians (excessive flatulence, cheating at sport, mothers eating their children's lice).
Camacho's prodigious work rate takes his toll and he starts to lose track of which characters belong in which soap, so the plots become increasingly confusing. Dead characters come back to life and others change career or family in the space of a paragraph.
By the end of the book, all three main characters have undergone major upheavals in their lives, yet in some ways each is still subject to the tyrannies of work, family and mind that burdened them at the outset.
Overall, it's an intriguing structure for a story, and parts of it are quite entertaining, but it never quite takes off and I found the ending rushed and unsatisfying.