Spending Christmas break at Winterhouse Hotel, eleven year-old Elizabeth discovers that she has magic and finds that her love of puzzles helps her solve a mystery.

Back at the Winterhouse Hotel, Elizabeth and Freddy dig deeper into the mystery surrounding Riley S. Granger, a hotel guest who left behind odd artifacts, including a magical book that the evil Gracella Winters attempted to use 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 licking as Elizabeth and Freddy...

In the aftermath of the 1906 San Francisco earthquake, twelve-year-old Clara finds a baby left on the doorstep of her family's boarding house, and sets out to unravel the surrounding mysteries.

In 1925, after witnessing the violent actions of some gangsters, twelve-year-old Emily accompanies her older sister on a trip to a hotel on the New Jersey shore but worries that the gangsters have come to the same hotel.