Well, in this novel, a key theme is the exploration of identity. As the girl in the story has this summer where she 'turns pretty', she also starts to figure out who she really is. Love and relationships are intertwined with this identity search. There's the theme of unrequited love at times, and the excitement and confusion of new romantic feelings. Plus, the setting of summer gives a sense of freedom and new beginnings which ties into all these themes.
The main themes include adolescence and transformation. In 'the summer i turned pretty novel', the main character goes through a lot of changes. It's not just physical but also emotional. Love is a big part of it too. She has feelings for different boys and has to figure out her heart. And family is also there in the background, influencing her decisions and experiences.