Book Four of the bestselling Lux series.

All Katy can do is survive. Surrounded by enemies, the only way she can come out of this is to adapt. After all, there are sides of Daedalus that don't seem entirely crazy, but the group's goals are frightening and the truths they speak even more disturbing. Who are the real bad guys? Daedalus? Mankind? Or the Luxen? Together, they can face anything. But the most dangerous foe has been there all along, and when the truths are exposed and the lies come crumbling down, which side will Daemon and Katy be standing on? And will they even be together?