The Secrets of Winterhouse by Ben Guterson
Back at the Winterhouse hotel for another holiday season, Elizabeth and Freddy dig deeper into the mystery surrounding Riley S. Granger, a hotel guest who left behind odd artifacts- one being a magical book that the evil Gracella Winters attempted to use the year before to gain destructive power over the entire Falls lineage. 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 magic ability – and she’s fearful it might lead her right into Gracella’s web.