A New York Times bestselling series
A USA TODAY bestselling series
A California Young Reader Medalwinning series

Dark schemes unfold and Sophie's loyalty is pushed to the limit in this thrilling fifth book in the Keeper of the Lost Cities series.

Sophie Foster is back in the Lost Citiesbut the Lost Cities have changed. The threat of war hangs heavy over her glittering world, and the Neverseen are wreaking havoc.

The lines between friend and enemy have blurred, and Sophie is unsure whom to trust. But when shes warned that the people she loves most will be the next victims, she knows she has to act.

A mysterious symbol could be the keyif only she knew how to translate it. Every new clue seems to lead deeper into her worlds underbelly and the Black Swan arent the only ones who have plans. The Neverseen have their own Initiative, and if Sophie doesnt stop it, they might finally have the ultimate means to control her.