The Secrets of Winterhouse by Ben Guterson (Paperback)

The two friends follow a trail of clues, inadvertently attracting the attention of a suspicious new hotel guest: Elana Vesper. The clock is ticking as Elizabeth and Freddy struggle to figure out whether Elana is merely a pawn or a player in the plot to revive the spirit of Gracella. If that wasn’t enough, Elizabeth suspects she is coming into her own special powers – and she’s fearful it might lead her right into Gracella’s vicious web.