A choose-your-own-adventure story for teens/adults! 
 Cashore sets up an introductory story taking place in a mansion on an island prepping for a ball. Plenty of suspicious activity and household mysteries abound. At one point, the protag has to make a choice to follow one of five different leads. And she does. And then she does again. And again. And again. And again. The novel breaks out into five separate storylines which was a very intriguing way to tell the larger story. Each storyline reveals more of the larger picture and after a while, revealed a bit of the connections between other storylines. It was truly masterful. 
 Personally, I lost interest a bit in the last two storylines because they were more fantastical and sci fi and I am less interested but I really appreciate what Cashore did here and will be recommending it to friends!