Flawless Girls by Anna-Marie McLemore 

Magical imagery!

17yo Isla and her 19yo older sister Renata are sent to the well known Alarie House finishing school by their grandmother, who insists that the school’s reputation will set them up for life. Isla leaves after a day but Renata stays and when she returns home, Isla notices how different she is acting and it frightens her. Renata runs away, so Isla decides she’s going back to Alarie House to find her. When Isla arrives at the finishing school, everyone raves about Renata to her but she’s nowhere to be found. What Isla does find is haunting.

Likes/dislikes: I enjoyed the analogy between jewels and people where flaws make us better and more beautiful. The author handled gender situations with tact and compassion and from personal experience. I liked Isla’s determination and intelligence.
Mature content: PG-13
Language: PG for 6 swears, no f-words.
Violence: PG-13 for bloody stabbing.
Ethnicity: mixed with Latina main characters.