A teenage girl’s humanity is at stake as the series praised as The Wizard of Oz meets Star Wars from the New York Times-bestselling author continues (Hugh Howey).

Despite overwhelming odds, Annie has done it! She’s stolen the Delphi Key from the most powerful man in Unity, Comptroller Franco Albanese.

But she lost the young dataminer who brought her to this strange new world. N-8 has been captured by Franco and taken to his Palace at Fort Knox.

Together with her newfound allies–the cute but cocky street thief Killian, who just happens to be Franco’s estranged son, making Annie mistrust him despite the fact that she’s desperately attracted to him, mechanical genius Kymee Revv who hides her beauty behind Kuboki makeup and sarcasm, and Revv’s father, Pierre Lafitte–Annie has retreated to the isolated desert oasis known as Mirage, a community built below the Mojave solar reservation and protected from Franco and his Chief Enforcer, Blake.

As she tries to decipher the mysteries hidden in the Key and decide her next move, Annie learns that there’s a larger conspiracy surrounding Delphi–one that goes back over a decade and involves Revv’s lost mother, her father, and Franco himself.

If Annie can’t trust the people who have saved her life, who can she trust? And if she must choose between saving N-8 and the lives of the other dataminers and saving the world, how can she decide to sacrifice the boy who is so very like her own brother back home?

Sacrificing her humanity might give Annie the strength she needs to save the world–or it could destroy it.