Imposters Series by Scott Westerfeld

"There are three books in this young adult series: Imposters, Shatter City, and Mirror’s Edge. The series follows identical twin sisters, Rafi and Frey. Rafi is known to the city as their beloved princess while Frey is the hidden sister, created to be a body double and ultimate warrior. The twins despise their father and independently devise plans to kill their father. Through a series of twists and turns, identity switches, and discovering who their true allies are, Rafi and Frey set out to save their city from their father." - L. Ngo

3/4 stars.