Orphan Elizabeth Somers's malevolent aunt and uncle ship her off to the ominous Winterhouse Hotel, owned by the peculiar Norbridge Falls. Upon arrival, Elizabeth quickly discovers that Winterhouse has many charms-most notably its massive library. It's not long before she locates a magical book of puzzles that will unlock a mystery involving Norbridge and his sinister family. But the deeper she delves into the hotel's secrets, the more Elizabeth starts...

"After a wild treasure hunt that almost got Gina, Edgar, Elena, and Kevin killed in a secret vault hidden in an abandoned amusement park, the CEEKs thought life would go back to normal. They'd saved their town from ruin and secured their friendship forever, right? Man, were they wrong. The only thing that returned to normal was middle school lunch."--

A world famous inventor disappears under mysterious circumstances. Leaving behind clues that lead to a well hidden secret. In a race against time, Timmi Tobbson and his friends hope to uncover and save the inventor's legacy, while an old and powerful enemy resurfaces, stopping at nothing to get there first.