In the Enemy’s Service (Annals of Alasia Book 2) by Annie Douglass
Enslaved when invaders take over Alasia, ten-year-old Anya discovers ways to spy on the enemy and slip information to the resistance. But then she uncovers a disturbing reference to her own family and is confronted by a stranger who seems to know her secrets. Holding her life in his hands, he claims to have proof that Anya's father was involved in the betrayal that led to the Invasion itself. Can Anya help save her kingdom without putting her father in danger ... and can she learn the truth about what happened before it's too late? In the Enemy's Service is the second book in the Annals of Alasia, but the first four in the series can be read in any order, and each book can stand on its own.
Book Length: Long Novel - 320-650 Pages