Trouble is haunting Cassidy Blake . . . even more than usual.She (plus her ghost best friend, Jacob, of course) is in Paris, where Casss parents are filming their TV show about the worlds most haunted cities. Sure, its fun eating croissants and seeing the Eiffel Tower, but theres true ghostly danger lurking beneath Paris, in the creepy underground Catacombs.When Cass accidentally awakens a frighteningly strong spirit, she must rely on her still-growing skills as a ghosthunter -- and turn to friends both old and new to help her unravel a mystery. But time is running out, and the spirit is only growing stronger.And if Cass fails, the force shes unleashed could haunt the city forever.#1 New Yor