What I think is most amazing about Bonjour Tristesse is that it was written by Sagan when she was just 17. When I was 17 my biggest concerns were (1) friend drama and (2) math class. Meanwhile, Sagan at 17 put together this amazing short novel. Very impressive.
The narrator of the novel is also a 17 year old girl, Cecile. She and her father are on vacation with a woman her father, a widower has been dating. When her father turns his attentions to another woman, Cecile decides to take matters into her own hands and manipulate the situation so that the woman she prefers can win back her father's heart. The novel is very short and beautifully written. I liked it a lot.