Staying at an elegant 'summer cottage' by the sea in famous Bar Harbor, Maine should be a fun, carefree vacation. It isn't long though before Mandy, Nick and companions are hot on the trail of a new mystery in this 7th book in the Key Mystery Series. Threatening messages on their bedroom mirror, spooky noises coming from the tower room, and a sinister stranger who follows them when they walk to town make them wonder what on earth is going on. Along with hidden stairways and secret passageways, the children discover a strange room that belonged to a girl who lived in the house at the time of the Great Fire in 1947. The legend is that she came to a tragic end and her ghost still haunts the old mansion. Will one of the keys they find lead them to the answers they seek? The Haunted Mansion Key, a creepy tale that weaves together events of the past and present, will give 8-12 years old delicious shivers down their spines!