Ten-year-old Leo's future and the fate of the extraordinary Whippet Hotel, where his father is the maintenance man, are at stake when a series of cryptic boxes leads Leo to hidden floors, strange puzzles, and unexpected alliances.

Using sophisticated technology and impressive coding skills to track down advanced cyber criminals, four savvy teens close in on a dangerous hacker before realizing that they are being led into a trap, in a story told through a collage of video segments, text, and website postings.

This volume provides a collection of ghostly and mysterious stories.