Night of the Raven, Dawn of the Dove

In Rati Mehrotra's YA fantasy novel Night of the Raven, Dawn of the Dove, a young guardswoman struggles with her unwitting role as a major pawn in the deadly games between two kingdoms in a monster-infested alternate medieval India.
Bound to the queen of Chandela by a forbidden soul bond that saved her when she was a child, Katyani has never fallen short of what's expected of her—becoming the best guardswoman the Garuda has ever seen and an advisor to the crown prince when he ascends to the throne. But when the latest assassination attempt against the royals leaves them with a faceless body and no leads to the perpetrator, Katyani is unwillingly shipped off to guard the Chandela princes in Acharya Mahavir's esteemed monastic school in Nandovana, a forest where monsters have roamed unchecked for generations.
Katyani wants nothing more than to return to her duties, especially when the Acharya starts asking questions about her past. The only upside of her...