Sapphique by Catherine Fisher
My rating: 4 of 5 stars
Finally a sequel that lives up to the original. Sapphique takes us back into the worlds of Incarceron and the Realm, to find out what happens to our friends Finn and Claudia, Keiro and Attia. Poor Attia gets neglected a bit near the end, but the other characters all find some sense of closure, at least. Lots of magical fantasy went in to this book, and it was a lot of fun finding out how it ended.