Nikki's Diary: c-85 Chronicles of a Very Unglamorous Life (Very Good Second Hand Book)
When Nikki's father is hired to handle disinfection at a high-end high school, he not only gets a year-long job, but also a scholarship for his daughter. And that is where Nikki's sinvivir begins, as she suddenly finds herself lost in a world unknown to her: that of pijerío. Soon he will meet Mackenzie, a girl who is always up to date and who leads the GPS group (Pretty, Popular and Nice). The war between her and Mackenzie to be number one is served.