Mirror's edge [Impostors Volume: Book 3]by Westerfeld, Scott 

BTSB Prebound(Scholastic Press, 2021)

BTSB #: 936516 Available

Dewey: FAges: 12-18   
AR: 4.8 MG+

Genres: Adventure Fiction Science Fiction Family Life

Subjects: Twins - Fiction Sisters - Fiction Father-daughter relationship - Fiction Identity (Psychology) - Fiction Secrets - Fiction Trust - Fiction Adventure ficton Science fiction

Summary: Raised to be her twin sister Rafia's body double and bodyguard, but now with new face and body Frey and her lover Col are determined to return to Shreve to rescue Boss X, a friend and ally in the rebellion of the free cities against people like Frey's father, ruthless ruler of Shreve; but Frey is troubled by things beyond the dangers of her mission--confusion over her own identity, guilt over having killed her brother (even if he was trying to kill Rafia at the time), and her sister's behavior.