The Rose Master by Valentina Cano

On Anne Tinning's seventeenth birthday, things change: birds fall from the sky and she's been dismissed from where she's worked since she was a child. When she arrives at Rosewood Manor, things are wrong and something's wearing it down. Staffed with only three other members and a master that's cold as ice, she can feel someone—something—watching her, clawing at her door, and she's not too sure she wants to know the truth.