Imposters by Scott Westerfeld

This dystopian action adventure revolves around identical twins. Rafi is the heir to the first family, the daughter of the ruler. Her twin Frey serves as her body double, trained to kill and to prevent assassination attempts. The story revolves around Frey, who is sent to Victoria in Rafi's place. She is sent as collateral, and the first family, the Palafoxes, believes she is Rafi. Frey meets the first family's son, Col, and trusts him, but finds she is in a situation she couldn't have anticipated and must escape. It's a story that relies on action and plot twists rather than character development and world building. My middle school book club liked it but didn't love it, and I found it to be forgettable. Readers who like dystopian books may enjoy it but it does not have the complexity or character development of series books such as Warcross and Legend, both by Marie Lu.