What is the author's style in Aunt Julia and the Scriptwriter by Mario Vargas Llosa?

Marito is the young star of his Peruvian family; he is educated, driven and still sociable with everyone around him. The main chapters of the story use his voice in the form of comfortable language and colloquialisms while still informing the reader that the main character is educated and witty. The native language of all of the main characters is Spanish, but there are only a few Spanish references left as such without translation into English. The radio serials are used to offer the reader a better look at the variety of levels of class and education through language.