Fallen (The Cure Chronicles #4)

When Ashen heads east to New York City to find Finn's brother, she finds herself confronted by an entirely new set of problems.

The city is a war zone overshadowed by the Behemoth, the largest Arcology in existence. Few are allowed entry, and those who go in never leave. At first, Ashen assumes the power structure is one she knows well: Directorate vs. Dregs, Wealthy vs. Poor.

She's seen this fight before, and she knows how to win it.

She soon discovers that the power in New York is held entirely by one young man. Known only as the Bishop, he's mysterious, unnervingly handsome, and smooth-voiced. His allure is undeniable, despite his tendency toward cruelty.

But as Ashen gets to know him, she begins to question how he managed to gain so much power at such a young age. Who is the Bishop, really? And where did he come from?

The even more mysterious question is....

What exactly goes on inside the Behemoth?