The Ward by Jordana Frankel

Jordana Frankel’s thrilling and imaginative YA dystopian novel The Ward is set in a near-future New York City. A catastrophic flood has washed out Manhattan, leaving the rivers polluted, and entire neighborhoods underwater. Some areas are quarantined because of an outbreak of a deadly disease.
 
The illness, known as the Blight, is killing sixteen-year-old Ren’s sister. Desperate to save her sister’s life, Ren agrees to lead a secret mission from the government to search for a cure. But her quest leads to a confounding mystery beneath the water and an unlikely friendship with a passionate scientist.
 
Readers who love speculative fiction and crave action-packed stories similar to Veronica Roth’s Divergent will find The Ward absolutely unputdownable.