Seventeen-year-old Cassia sacrifices everything and heads to the Outer Provinces in search of Ky, where she is confronted with shocking revelatio

"In search of a better life, Cassia joins a widespread rebellion against Society, where she is tasked with finding a cure to the threat of surviv

"Rio has always dreamed of leaving the underwater city of Atlantia for life in the Above; however, when her twin sister, Bay, makes an unexpected