This one’s set in the world of Just Ella, but you don’t need to have read it to understand Palace of Mirrors.
We’re now in the rival kingdom following a peasant girl named Cecilia. Cecilia goes about her normal peasant-type chores during the day, but at night she is trained by one of the King’s Order in the ways of being a princess. Cecilia is in hiding for her protection while a decoy princess sits on the throne.
This fits right in with Haddix’s mystery and hidden agendas. Just like with Found, there’s a surprise at the end that ties everything together. This surprise was told to me ahead of time (thanks, Ms. Standhart…) and I still was able to enjoy the book.
There is a romance, but it’s more of the close-friends type through most of the book. If you’re looking for a light fantasy, with people kissing frogs and all that, this is probably not your choice. Castle life is rough, with lots of betrayal and murders. If you like mysteries and intrigue, you’ll like Palace of Mirrors.