Sophie Foster is struggling. Grieving. Scrambling. But she knows one thing: she will not be defeated.

The Neverseen have had their victories--but the battle is far from over. It's time to change tactics. Make sacrifices. Reexamine everything. Maybe even time for Sophie to trust her enemies.

All paths lead to Nightfall--an ominous door to an even more ominous place--and Sophie and her friends strike a dangerous bargain to get there. But nothing can prepare them for what they discover. The problems they're facing stretch deep into their history. And with time running out, and mistakes catching up with them, Sophie and her allies must join forces in ways they never have before.

In this spectacular sixth book in the New York Times and USA TODAY bestselling Keeper of the Lost Cities series, Sophie must uncover the truth about the Lost Cities' insidious past, before it repeats itself and changes reality.

Sophie Foster has never quite fit into her life. The reason? Sophie's a Telepath, someone who can read minds. No one knows her secret-at least, that's what she thinks...

It turns out the reason Sophie has never felt at home is that, well...she isn't. And as she sets out for a new life that is vastly different from what she has ever known, telepathy is just the first of many shocking secrets that will be revealed.