A world in the future in which climate change caused mass migration and made areas of the world inhabitable, the rich got together to create safe, isolated cities for the few lucky ones to have a "normal" life, unaffected by the weather of the outside world. 
I guess the story is not too far-fetched...
This one in particular puts a feminist and queer spin on it. It made me reflect on some mental models and ideas I hold in my head. Made me think a lot about my feminism.

I see why other people are complaining that the characters do not have a lot of depth and that the interactions sometimes seem forced. It is true to some extent but did not bother me too much. Yes, it was kinda a romance / queer love book that was not an incredible original in its dialogues and relationship building, but my shallow self could live with it. I found the world and the ideas it proposed much more interesting, anyway.